diff --git a/.openapi-generator/FILES b/.openapi-generator/FILES
index 2450528..032bb40 100644
--- a/.openapi-generator/FILES
+++ b/.openapi-generator/FILES
@@ -202,6 +202,9 @@ src/Bandwidth.Standard/Api/TranscriptionsApi.cs
 src/Bandwidth.Standard/Client/ApiClient.cs
 src/Bandwidth.Standard/Client/ApiException.cs
 src/Bandwidth.Standard/Client/ApiResponse.cs
+src/Bandwidth.Standard/Client/Auth/OAuthAuthenticator.cs
+src/Bandwidth.Standard/Client/Auth/OAuthFlow.cs
+src/Bandwidth.Standard/Client/Auth/TokenResponse.cs
 src/Bandwidth.Standard/Client/ClientUtils.cs
 src/Bandwidth.Standard/Client/Configuration.cs
 src/Bandwidth.Standard/Client/ExceptionFactory.cs
diff --git a/README.md b/README.md
index 00b0a95..70f81cf 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new CallsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -349,3 +351,11 @@ Authentication schemes defined for the API:
 
 - **Type**: HTTP basic authentication
 
+<a id="OAuth2"></a>
+### OAuth2
+
+- **Type**: OAuth
+- **Flow**: application
+- **Authorization URL**: 
+- **Scopes**: N/A
+
diff --git a/api/openapi.yaml b/api/openapi.yaml
index cfdbd76..7113704 100644
--- a/api/openapi.yaml
+++ b/api/openapi.yaml
@@ -11,6 +11,7 @@ servers:
 - url: /
 security:
 - Basic: []
+- OAuth2: []
 tags:
 - name: Messages
 - name: Media
@@ -14800,4 +14801,10 @@ components:
         - Example: `Authorization: Basic ZGVtbZpwQDU1dzByZA==`
       scheme: basic
       type: http
+    OAuth2:
+      flows:
+        clientCredentials:
+          scopes: {}
+          tokenUrl: https://api.bandwidth.com/api/v1/oauth2/token
+      type: oauth2
 
diff --git a/bandwidth.yml b/bandwidth.yml
index 6ee15ae..9ab77fd 100644
--- a/bandwidth.yml
+++ b/bandwidth.yml
@@ -9,6 +9,7 @@ info:
   version: 1.0.0
 security:
   - Basic: []
+  - OAuth2: []
 tags:
   - name: Messages
   - name: Media
@@ -8427,6 +8428,12 @@ components:
 
 
         - Example: `Authorization: Basic ZGVtbZpwQDU1dzByZA==`
+    OAuth2:
+      type: oauth2
+      flows:
+        clientCredentials:
+          tokenUrl: https://api.bandwidth.com/api/v1/oauth2/token
+          scopes: {}
   callbacks:
     inboundCallback:
       '{inboundCallbackUrl}':
diff --git a/docs/CallsApi.md b/docs/CallsApi.md
index 05a24cf..0b466eb 100644
--- a/docs/CallsApi.md
+++ b/docs/CallsApi.md
@@ -37,6 +37,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new CallsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -92,7 +94,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -142,6 +144,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new CallsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -197,7 +201,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -247,6 +251,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new CallsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -314,7 +320,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -364,6 +370,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new CallsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -417,7 +425,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -468,6 +476,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new CallsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -524,7 +534,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/ConferencesApi.md b/docs/ConferencesApi.md
index 1d6da39..b956ad8 100644
--- a/docs/ConferencesApi.md
+++ b/docs/ConferencesApi.md
@@ -41,6 +41,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -98,7 +100,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -148,6 +150,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -203,7 +207,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -253,6 +257,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -310,7 +316,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -360,6 +366,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -417,7 +425,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -467,6 +475,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -522,7 +532,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -572,6 +582,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -635,7 +647,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -685,6 +697,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -738,7 +752,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -788,6 +802,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -844,7 +860,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -894,6 +910,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new ConferencesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -949,7 +967,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/MFAApi.md b/docs/MFAApi.md
index 525197a..c8d7e4a 100644
--- a/docs/MFAApi.md
+++ b/docs/MFAApi.md
@@ -35,6 +35,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MFAApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -90,7 +92,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -136,6 +138,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MFAApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -191,7 +195,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -237,6 +241,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MFAApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -292,7 +298,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/MediaApi.md b/docs/MediaApi.md
index da780d2..dc2862f 100644
--- a/docs/MediaApi.md
+++ b/docs/MediaApi.md
@@ -36,6 +36,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MediaApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -87,7 +89,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -137,6 +139,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MediaApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -192,7 +196,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -242,6 +246,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MediaApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -297,7 +303,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -347,6 +353,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MediaApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -404,7 +412,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/MessagesApi.md b/docs/MessagesApi.md
index 52296ff..ddd281a 100644
--- a/docs/MessagesApi.md
+++ b/docs/MessagesApi.md
@@ -34,6 +34,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MessagesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -89,7 +91,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -140,6 +142,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MessagesApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -247,7 +251,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/MultiChannelApi.md b/docs/MultiChannelApi.md
index 9bef903..5df7ea1 100644
--- a/docs/MultiChannelApi.md
+++ b/docs/MultiChannelApi.md
@@ -33,6 +33,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new MultiChannelApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -88,7 +90,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/PhoneNumberLookupApi.md b/docs/PhoneNumberLookupApi.md
index 14265b4..84488bd 100644
--- a/docs/PhoneNumberLookupApi.md
+++ b/docs/PhoneNumberLookupApi.md
@@ -35,6 +35,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new PhoneNumberLookupApi(config);
             var accountId = 9900000;  // string | 
@@ -90,7 +92,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -133,6 +135,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new PhoneNumberLookupApi(config);
             var accountId = 9900000;  // string | 
@@ -286,7 +290,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/RecordingsApi.md b/docs/RecordingsApi.md
index ec1e1b3..21fdfb8 100644
--- a/docs/RecordingsApi.md
+++ b/docs/RecordingsApi.md
@@ -42,6 +42,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -95,7 +97,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -145,6 +147,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -198,7 +202,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -248,6 +252,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -301,7 +307,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -351,6 +357,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -408,7 +416,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -458,6 +466,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -515,7 +525,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -565,6 +575,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -622,7 +634,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -672,6 +684,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -733,7 +747,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -783,6 +797,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -838,7 +854,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -888,6 +904,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -943,7 +961,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -993,6 +1011,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new RecordingsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -1046,7 +1066,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/StatisticsApi.md b/docs/StatisticsApi.md
index 73aa157..075657f 100644
--- a/docs/StatisticsApi.md
+++ b/docs/StatisticsApi.md
@@ -33,6 +33,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new StatisticsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -86,7 +88,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/TollFreeVerificationApi.md b/docs/TollFreeVerificationApi.md
index 6915196..bb69f97 100644
--- a/docs/TollFreeVerificationApi.md
+++ b/docs/TollFreeVerificationApi.md
@@ -41,6 +41,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -96,7 +98,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -146,6 +148,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -197,7 +201,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -247,6 +251,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -298,7 +304,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -348,6 +354,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -403,7 +411,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -453,6 +461,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
 
@@ -501,7 +511,7 @@ This endpoint does not need any parameter.
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -551,6 +561,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -604,7 +616,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -653,6 +665,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -704,7 +718,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -753,6 +767,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -806,7 +822,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -855,6 +871,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TollFreeVerificationApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -912,7 +930,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/docs/TranscriptionsApi.md b/docs/TranscriptionsApi.md
index 577c33a..4cf6b66 100644
--- a/docs/TranscriptionsApi.md
+++ b/docs/TranscriptionsApi.md
@@ -35,6 +35,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TranscriptionsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -88,7 +90,7 @@ void (empty response body)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -138,6 +140,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TranscriptionsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -195,7 +199,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
@@ -245,6 +249,8 @@ namespace Example
             // Configure HTTP basic authorization: Basic
             config.Username = "YOUR_USERNAME";
             config.Password = "YOUR_PASSWORD";
+            // Configure OAuth2 access token for authorization: OAuth2
+            config.AccessToken = "YOUR_ACCESS_TOKEN";
 
             var apiInstance = new TranscriptionsApi(config);
             var accountId = 9900000;  // string | Your Bandwidth Account ID.
@@ -300,7 +306,7 @@ catch (ApiException e)
 
 ### Authorization
 
-[Basic](../README.md#Basic)
+[Basic](../README.md#Basic), [OAuth2](../README.md#OAuth2)
 
 ### HTTP request headers
 
diff --git a/src/Bandwidth.Standard/Api/CallsApi.cs b/src/Bandwidth.Standard/Api/CallsApi.cs
index 5f3b308..749cda4 100644
--- a/src/Bandwidth.Standard/Api/CallsApi.cs
+++ b/src/Bandwidth.Standard/Api/CallsApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -519,6 +520,22 @@ public Bandwidth.Standard.Client.ApiResponse<CreateCallResponse> CreateCallWithH
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<CreateCallResponse>("/accounts/{accountId}/calls", localVarRequestOptions, this.Configuration);
@@ -608,6 +625,22 @@ public Bandwidth.Standard.Client.ApiResponse<CreateCallResponse> CreateCallWithH
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<CreateCallResponse>("/accounts/{accountId}/calls", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -694,6 +727,22 @@ public Bandwidth.Standard.Client.ApiResponse<CallState> GetCallStateWithHttpInfo
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<CallState>("/accounts/{accountId}/calls/{callId}", localVarRequestOptions, this.Configuration);
@@ -782,6 +831,22 @@ public Bandwidth.Standard.Client.ApiResponse<CallState> GetCallStateWithHttpInfo
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<CallState>("/accounts/{accountId}/calls/{callId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -901,6 +966,22 @@ public Bandwidth.Standard.Client.ApiResponse<CallState> GetCallStateWithHttpInfo
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<List<CallState>>("/accounts/{accountId}/calls", localVarRequestOptions, this.Configuration);
@@ -1022,6 +1103,22 @@ public Bandwidth.Standard.Client.ApiResponse<CallState> GetCallStateWithHttpInfo
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<List<CallState>>("/accounts/{accountId}/calls", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1117,6 +1214,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateCallWithHttpInfo(stri
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<Object>("/accounts/{accountId}/calls/{callId}", localVarRequestOptions, this.Configuration);
@@ -1214,6 +1327,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateCallWithHttpInfo(stri
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<Object>("/accounts/{accountId}/calls/{callId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1309,6 +1438,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateCallBxmlWithHttpInfo(
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Put<Object>("/accounts/{accountId}/calls/{callId}/bxml", localVarRequestOptions, this.Configuration);
@@ -1406,6 +1551,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateCallBxmlWithHttpInfo(
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PutAsync<Object>("/accounts/{accountId}/calls/{callId}/bxml", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/ConferencesApi.cs b/src/Bandwidth.Standard/Api/ConferencesApi.cs
index 3e8eddd..7e4d71b 100644
--- a/src/Bandwidth.Standard/Api/ConferencesApi.cs
+++ b/src/Bandwidth.Standard/Api/ConferencesApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -749,6 +750,22 @@ public System.IO.Stream DownloadConferenceRecording(string accountId, string con
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<System.IO.Stream>("/accounts/{accountId}/conferences/{conferenceId}/recordings/{recordingId}/media", localVarRequestOptions, this.Configuration);
@@ -848,6 +865,22 @@ public System.IO.Stream DownloadConferenceRecording(string accountId, string con
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<System.IO.Stream>("/accounts/{accountId}/conferences/{conferenceId}/recordings/{recordingId}/media", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -934,6 +967,22 @@ public Bandwidth.Standard.Client.ApiResponse<Conference> GetConferenceWithHttpIn
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<Conference>("/accounts/{accountId}/conferences/{conferenceId}", localVarRequestOptions, this.Configuration);
@@ -1022,6 +1071,22 @@ public Bandwidth.Standard.Client.ApiResponse<Conference> GetConferenceWithHttpIn
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<Conference>("/accounts/{accountId}/conferences/{conferenceId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1117,6 +1182,22 @@ public Bandwidth.Standard.Client.ApiResponse<ConferenceMember> GetConferenceMemb
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<ConferenceMember>("/accounts/{accountId}/conferences/{conferenceId}/members/{memberId}", localVarRequestOptions, this.Configuration);
@@ -1214,6 +1295,22 @@ public Bandwidth.Standard.Client.ApiResponse<ConferenceMember> GetConferenceMemb
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<ConferenceMember>("/accounts/{accountId}/conferences/{conferenceId}/members/{memberId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1309,6 +1406,22 @@ public Bandwidth.Standard.Client.ApiResponse<ConferenceRecordingMetadata> GetCon
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<ConferenceRecordingMetadata>("/accounts/{accountId}/conferences/{conferenceId}/recordings/{recordingId}", localVarRequestOptions, this.Configuration);
@@ -1406,6 +1519,22 @@ public Bandwidth.Standard.Client.ApiResponse<ConferenceRecordingMetadata> GetCon
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<ConferenceRecordingMetadata>("/accounts/{accountId}/conferences/{conferenceId}/recordings/{recordingId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1492,6 +1621,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<ConferenceRecordingMetadata>>
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<List<ConferenceRecordingMetadata>>("/accounts/{accountId}/conferences/{conferenceId}/recordings", localVarRequestOptions, this.Configuration);
@@ -1580,6 +1725,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<ConferenceRecordingMetadata>>
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<List<ConferenceRecordingMetadata>>("/accounts/{accountId}/conferences/{conferenceId}/recordings", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1687,6 +1848,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<ConferenceRecordingMetadata>>
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<List<Conference>>("/accounts/{accountId}/conferences", localVarRequestOptions, this.Configuration);
@@ -1796,6 +1973,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<ConferenceRecordingMetadata>>
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<List<Conference>>("/accounts/{accountId}/conferences", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1891,6 +2084,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateConferenceWithHttpInf
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<Object>("/accounts/{accountId}/conferences/{conferenceId}", localVarRequestOptions, this.Configuration);
@@ -1988,6 +2197,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateConferenceWithHttpInf
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<Object>("/accounts/{accountId}/conferences/{conferenceId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -2083,6 +2308,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateConferenceBxmlWithHtt
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Put<Object>("/accounts/{accountId}/conferences/{conferenceId}/bxml", localVarRequestOptions, this.Configuration);
@@ -2180,6 +2421,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateConferenceBxmlWithHtt
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PutAsync<Object>("/accounts/{accountId}/conferences/{conferenceId}/bxml", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -2284,6 +2541,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateConferenceMemberWithH
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Put<Object>("/accounts/{accountId}/conferences/{conferenceId}/members/{memberId}", localVarRequestOptions, this.Configuration);
@@ -2390,6 +2663,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateConferenceMemberWithH
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PutAsync<Object>("/accounts/{accountId}/conferences/{conferenceId}/members/{memberId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/MFAApi.cs b/src/Bandwidth.Standard/Api/MFAApi.cs
index edab657..10535a3 100644
--- a/src/Bandwidth.Standard/Api/MFAApi.cs
+++ b/src/Bandwidth.Standard/Api/MFAApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -383,6 +384,22 @@ public Bandwidth.Standard.Client.ApiResponse<MessagingCodeResponse> GenerateMess
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<MessagingCodeResponse>("/accounts/{accountId}/code/messaging", localVarRequestOptions, this.Configuration);
@@ -472,6 +489,22 @@ public Bandwidth.Standard.Client.ApiResponse<MessagingCodeResponse> GenerateMess
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<MessagingCodeResponse>("/accounts/{accountId}/code/messaging", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -559,6 +592,22 @@ public Bandwidth.Standard.Client.ApiResponse<VoiceCodeResponse> GenerateVoiceCod
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<VoiceCodeResponse>("/accounts/{accountId}/code/voice", localVarRequestOptions, this.Configuration);
@@ -648,6 +697,22 @@ public Bandwidth.Standard.Client.ApiResponse<VoiceCodeResponse> GenerateVoiceCod
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<VoiceCodeResponse>("/accounts/{accountId}/code/voice", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -735,6 +800,22 @@ public Bandwidth.Standard.Client.ApiResponse<VerifyCodeResponse> VerifyCodeWithH
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<VerifyCodeResponse>("/accounts/{accountId}/code/verify", localVarRequestOptions, this.Configuration);
@@ -824,6 +905,22 @@ public Bandwidth.Standard.Client.ApiResponse<VerifyCodeResponse> VerifyCodeWithH
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<VerifyCodeResponse>("/accounts/{accountId}/code/verify", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/MediaApi.cs b/src/Bandwidth.Standard/Api/MediaApi.cs
index 4be556e..5ffa2cb 100644
--- a/src/Bandwidth.Standard/Api/MediaApi.cs
+++ b/src/Bandwidth.Standard/Api/MediaApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -445,6 +446,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteMediaWithHttpInfo(str
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Delete<Object>("/users/{accountId}/media/{mediaId}", localVarRequestOptions, this.Configuration);
@@ -532,6 +549,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteMediaWithHttpInfo(str
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.DeleteAsync<Object>("/users/{accountId}/media/{mediaId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -619,6 +652,22 @@ public System.IO.Stream GetMedia(string accountId, string mediaId, int operation
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<System.IO.Stream>("/users/{accountId}/media/{mediaId}", localVarRequestOptions, this.Configuration);
@@ -708,6 +757,22 @@ public System.IO.Stream GetMedia(string accountId, string mediaId, int operation
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<System.IO.Stream>("/users/{accountId}/media/{mediaId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -791,6 +856,22 @@ public System.IO.Stream GetMedia(string accountId, string mediaId, int operation
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<List<Media>>("/users/{accountId}/media", localVarRequestOptions, this.Configuration);
@@ -876,6 +957,22 @@ public System.IO.Stream GetMedia(string accountId, string mediaId, int operation
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<List<Media>>("/users/{accountId}/media", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1030,6 +1127,22 @@ public System.IO.Stream GetMedia(string accountId, string mediaId, int operation
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Put<Object>("/users/{accountId}/media/{mediaId}", localVarRequestOptions, this.Configuration);
@@ -1186,6 +1299,22 @@ public System.IO.Stream GetMedia(string accountId, string mediaId, int operation
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PutAsync<Object>("/users/{accountId}/media/{mediaId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/MessagesApi.cs b/src/Bandwidth.Standard/Api/MessagesApi.cs
index 4e108ac..7b11fb0 100644
--- a/src/Bandwidth.Standard/Api/MessagesApi.cs
+++ b/src/Bandwidth.Standard/Api/MessagesApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -435,6 +436,22 @@ public Bandwidth.Standard.Client.ApiResponse<Message> CreateMessageWithHttpInfo(
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<Message>("/users/{accountId}/messages", localVarRequestOptions, this.Configuration);
@@ -524,6 +541,22 @@ public Bandwidth.Standard.Client.ApiResponse<Message> CreateMessageWithHttpInfo(
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<Message>("/users/{accountId}/messages", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -763,6 +796,22 @@ public Bandwidth.Standard.Client.ApiResponse<Message> CreateMessageWithHttpInfo(
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<MessagesList>("/users/{accountId}/messages", localVarRequestOptions, this.Configuration);
@@ -1004,6 +1053,22 @@ public Bandwidth.Standard.Client.ApiResponse<Message> CreateMessageWithHttpInfo(
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<MessagesList>("/users/{accountId}/messages", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/MultiChannelApi.cs b/src/Bandwidth.Standard/Api/MultiChannelApi.cs
index a0e1daf..7542b3e 100644
--- a/src/Bandwidth.Standard/Api/MultiChannelApi.cs
+++ b/src/Bandwidth.Standard/Api/MultiChannelApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -279,6 +280,22 @@ public Bandwidth.Standard.Client.ApiResponse<CreateMultiChannelMessageResponse>
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<CreateMultiChannelMessageResponse>("/users/{accountId}/messages/multiChannel", localVarRequestOptions, this.Configuration);
@@ -368,6 +385,22 @@ public Bandwidth.Standard.Client.ApiResponse<CreateMultiChannelMessageResponse>
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<CreateMultiChannelMessageResponse>("/users/{accountId}/messages/multiChannel", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/PhoneNumberLookupApi.cs b/src/Bandwidth.Standard/Api/PhoneNumberLookupApi.cs
index 10e8e76..3747068 100644
--- a/src/Bandwidth.Standard/Api/PhoneNumberLookupApi.cs
+++ b/src/Bandwidth.Standard/Api/PhoneNumberLookupApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -383,6 +384,22 @@ public Bandwidth.Standard.Client.ApiResponse<CreateAsyncBulkLookupResponse> Crea
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<CreateAsyncBulkLookupResponse>("/accounts/{accountId}/phoneNumberLookup/bulk", localVarRequestOptions, this.Configuration);
@@ -472,6 +489,22 @@ public Bandwidth.Standard.Client.ApiResponse<CreateAsyncBulkLookupResponse> Crea
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<CreateAsyncBulkLookupResponse>("/accounts/{accountId}/phoneNumberLookup/bulk", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -728,6 +761,22 @@ public Bandwidth.Standard.Client.ApiResponse<GetAsyncBulkLookupResponse> GetAsyn
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<GetAsyncBulkLookupResponse>("/accounts/{accountId}/phoneNumberLookup/bulk/{requestId}", localVarRequestOptions, this.Configuration);
@@ -810,6 +859,22 @@ public Bandwidth.Standard.Client.ApiResponse<GetAsyncBulkLookupResponse> GetAsyn
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<GetAsyncBulkLookupResponse>("/accounts/{accountId}/phoneNumberLookup/bulk/{requestId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/RecordingsApi.cs b/src/Bandwidth.Standard/Api/RecordingsApi.cs
index 6eac889..edb9cfe 100644
--- a/src/Bandwidth.Standard/Api/RecordingsApi.cs
+++ b/src/Bandwidth.Standard/Api/RecordingsApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -802,6 +803,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteRecordingWithHttpInfo
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Delete<Object>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}", localVarRequestOptions, this.Configuration);
@@ -898,6 +915,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteRecordingWithHttpInfo
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.DeleteAsync<Object>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -992,6 +1025,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteRecordingMediaWithHtt
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Delete<Object>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/media", localVarRequestOptions, this.Configuration);
@@ -1088,6 +1137,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteRecordingMediaWithHtt
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.DeleteAsync<Object>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/media", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1182,6 +1247,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteRecordingTranscriptio
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Delete<Object>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription", localVarRequestOptions, this.Configuration);
@@ -1278,6 +1359,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteRecordingTranscriptio
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.DeleteAsync<Object>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1375,6 +1472,22 @@ public System.IO.Stream DownloadCallRecording(string accountId, string callId, s
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<System.IO.Stream>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/media", localVarRequestOptions, this.Configuration);
@@ -1474,6 +1587,22 @@ public System.IO.Stream DownloadCallRecording(string accountId, string callId, s
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<System.IO.Stream>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/media", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1569,6 +1698,22 @@ public Bandwidth.Standard.Client.ApiResponse<CallRecordingMetadata> GetCallRecor
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<CallRecordingMetadata>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}", localVarRequestOptions, this.Configuration);
@@ -1666,6 +1811,22 @@ public Bandwidth.Standard.Client.ApiResponse<CallRecordingMetadata> GetCallRecor
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<CallRecordingMetadata>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1761,6 +1922,22 @@ public Bandwidth.Standard.Client.ApiResponse<RecordingTranscriptions> GetRecordi
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<RecordingTranscriptions>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription", localVarRequestOptions, this.Configuration);
@@ -1858,6 +2035,22 @@ public Bandwidth.Standard.Client.ApiResponse<RecordingTranscriptions> GetRecordi
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<RecordingTranscriptions>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1959,6 +2152,22 @@ public Bandwidth.Standard.Client.ApiResponse<RecordingTranscriptions> GetRecordi
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<List<CallRecordingMetadata>>("/accounts/{accountId}/recordings", localVarRequestOptions, this.Configuration);
@@ -2062,6 +2271,22 @@ public Bandwidth.Standard.Client.ApiResponse<RecordingTranscriptions> GetRecordi
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<List<CallRecordingMetadata>>("/accounts/{accountId}/recordings", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -2148,6 +2373,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<CallRecordingMetadata>> ListCa
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<List<CallRecordingMetadata>>("/accounts/{accountId}/calls/{callId}/recordings", localVarRequestOptions, this.Configuration);
@@ -2236,6 +2477,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<CallRecordingMetadata>> ListCa
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<List<CallRecordingMetadata>>("/accounts/{accountId}/calls/{callId}/recordings", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -2340,6 +2597,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> TranscribeCallRecordingWith
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<Object>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription", localVarRequestOptions, this.Configuration);
@@ -2446,6 +2719,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> TranscribeCallRecordingWith
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<Object>("/accounts/{accountId}/calls/{callId}/recordings/{recordingId}/transcription", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -2541,6 +2830,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateCallRecordingStateWit
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Put<Object>("/accounts/{accountId}/calls/{callId}/recording", localVarRequestOptions, this.Configuration);
@@ -2638,6 +2943,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateCallRecordingStateWit
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PutAsync<Object>("/accounts/{accountId}/calls/{callId}/recording", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/StatisticsApi.cs b/src/Bandwidth.Standard/Api/StatisticsApi.cs
index 55534f6..fb5c1ae 100644
--- a/src/Bandwidth.Standard/Api/StatisticsApi.cs
+++ b/src/Bandwidth.Standard/Api/StatisticsApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -265,6 +266,22 @@ public Bandwidth.Standard.Client.ApiResponse<AccountStatistics> GetStatisticsWit
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<AccountStatistics>("/accounts/{accountId}/statistics", localVarRequestOptions, this.Configuration);
@@ -344,6 +361,22 @@ public Bandwidth.Standard.Client.ApiResponse<AccountStatistics> GetStatisticsWit
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<AccountStatistics>("/accounts/{accountId}/statistics", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/TollFreeVerificationApi.cs b/src/Bandwidth.Standard/Api/TollFreeVerificationApi.cs
index 587a0f5..104d8ff 100644
--- a/src/Bandwidth.Standard/Api/TollFreeVerificationApi.cs
+++ b/src/Bandwidth.Standard/Api/TollFreeVerificationApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -691,6 +692,22 @@ public Bandwidth.Standard.Client.ApiResponse<WebhookSubscription> CreateWebhookS
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<WebhookSubscription>("/accounts/{accountId}/tollFreeVerification/webhooks/subscriptions", localVarRequestOptions, this.Configuration);
@@ -780,6 +797,22 @@ public Bandwidth.Standard.Client.ApiResponse<WebhookSubscription> CreateWebhookS
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<WebhookSubscription>("/accounts/{accountId}/tollFreeVerification/webhooks/subscriptions", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -865,6 +898,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteVerificationRequestWi
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Delete<Object>("/accounts/{accountId}/phoneNumbers/{phoneNumber}/tollFreeVerification", localVarRequestOptions, this.Configuration);
@@ -952,6 +1001,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteVerificationRequestWi
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.DeleteAsync<Object>("/accounts/{accountId}/phoneNumbers/{phoneNumber}/tollFreeVerification", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1037,6 +1102,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteWebhookSubscriptionWi
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Delete<Object>("/accounts/{accountId}/tollFreeVerification/webhooks/subscriptions/{id}", localVarRequestOptions, this.Configuration);
@@ -1124,6 +1205,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteWebhookSubscriptionWi
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.DeleteAsync<Object>("/accounts/{accountId}/tollFreeVerification/webhooks/subscriptions/{id}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1210,6 +1307,22 @@ public Bandwidth.Standard.Client.ApiResponse<TfvStatus> GetTollFreeVerificationS
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<TfvStatus>("/accounts/{accountId}/phoneNumbers/{phoneNumber}/tollFreeVerification", localVarRequestOptions, this.Configuration);
@@ -1298,6 +1411,22 @@ public Bandwidth.Standard.Client.ApiResponse<TfvStatus> GetTollFreeVerificationS
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<TfvStatus>("/accounts/{accountId}/phoneNumbers/{phoneNumber}/tollFreeVerification", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1366,6 +1495,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<string>> ListTollFreeUseCasesW
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<List<string>>("/tollFreeVerification/useCases", localVarRequestOptions, this.Configuration);
@@ -1436,6 +1581,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<string>> ListTollFreeUseCasesW
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<List<string>>("/tollFreeVerification/useCases", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1513,6 +1674,22 @@ public Bandwidth.Standard.Client.ApiResponse<WebhookSubscriptionsListBody> ListW
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<WebhookSubscriptionsListBody>("/accounts/{accountId}/tollFreeVerification/webhooks/subscriptions", localVarRequestOptions, this.Configuration);
@@ -1592,6 +1769,22 @@ public Bandwidth.Standard.Client.ApiResponse<WebhookSubscriptionsListBody> ListW
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<WebhookSubscriptionsListBody>("/accounts/{accountId}/tollFreeVerification/webhooks/subscriptions", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1678,6 +1871,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> RequestTollFreeVerification
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Post<Object>("/accounts/{accountId}/tollFreeVerification", localVarRequestOptions, this.Configuration);
@@ -1766,6 +1975,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> RequestTollFreeVerification
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PostAsync<Object>("/accounts/{accountId}/tollFreeVerification", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -1861,6 +2086,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateTollFreeVerificationR
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Put<Object>("/accounts/{accountId}/phoneNumbers/{phoneNumber}/tollFreeVerification", localVarRequestOptions, this.Configuration);
@@ -1958,6 +2199,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> UpdateTollFreeVerificationR
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PutAsync<Object>("/accounts/{accountId}/phoneNumbers/{phoneNumber}/tollFreeVerification", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -2054,6 +2311,22 @@ public Bandwidth.Standard.Client.ApiResponse<WebhookSubscription> UpdateWebhookS
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Put<WebhookSubscription>("/accounts/{accountId}/tollFreeVerification/webhooks/subscriptions/{id}", localVarRequestOptions, this.Configuration);
@@ -2152,6 +2425,22 @@ public Bandwidth.Standard.Client.ApiResponse<WebhookSubscription> UpdateWebhookS
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.PutAsync<WebhookSubscription>("/accounts/{accountId}/tollFreeVerification/webhooks/subscriptions/{id}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Api/TranscriptionsApi.cs b/src/Bandwidth.Standard/Api/TranscriptionsApi.cs
index e4f5224..4770333 100644
--- a/src/Bandwidth.Standard/Api/TranscriptionsApi.cs
+++ b/src/Bandwidth.Standard/Api/TranscriptionsApi.cs
@@ -16,6 +16,7 @@
 using System.Net;
 using System.Net.Mime;
 using Bandwidth.Standard.Client;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Api
@@ -398,6 +399,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteRealTimeTranscription
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Delete<Object>("/accounts/{accountId}/calls/{callId}/transcriptions/{transcriptionId}", localVarRequestOptions, this.Configuration);
@@ -494,6 +511,22 @@ public Bandwidth.Standard.Client.ApiResponse<Object> DeleteRealTimeTranscription
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.DeleteAsync<Object>("/accounts/{accountId}/calls/{callId}/transcriptions/{transcriptionId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -589,6 +622,22 @@ public Bandwidth.Standard.Client.ApiResponse<CallTranscriptionResponse> GetRealT
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<CallTranscriptionResponse>("/accounts/{accountId}/calls/{callId}/transcriptions/{transcriptionId}", localVarRequestOptions, this.Configuration);
@@ -686,6 +735,22 @@ public Bandwidth.Standard.Client.ApiResponse<CallTranscriptionResponse> GetRealT
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<CallTranscriptionResponse>("/accounts/{accountId}/calls/{callId}/transcriptions/{transcriptionId}", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
@@ -772,6 +837,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<CallTranscriptionMetadata>> Li
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = this.Client.Get<List<CallTranscriptionMetadata>>("/accounts/{accountId}/calls/{callId}/transcriptions", localVarRequestOptions, this.Configuration);
@@ -860,6 +941,22 @@ public Bandwidth.Standard.Client.ApiResponse<List<CallTranscriptionMetadata>> Li
             {
                 localVarRequestOptions.HeaderParameters.Add("Authorization", "Basic " + Bandwidth.Standard.Client.ClientUtils.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password));
             }
+            // authentication (OAuth2) required
+            // oauth required
+            if (!localVarRequestOptions.HeaderParameters.ContainsKey("Authorization"))
+            {
+                if (!string.IsNullOrEmpty(this.Configuration.AccessToken))
+                {
+                    localVarRequestOptions.HeaderParameters.Add("Authorization", "Bearer " + this.Configuration.AccessToken);
+                }
+                else if (!string.IsNullOrEmpty(this.Configuration.OAuthTokenUrl) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientId) &&
+                         !string.IsNullOrEmpty(this.Configuration.OAuthClientSecret) &&
+                         this.Configuration.OAuthFlow != null)
+                {
+                    localVarRequestOptions.OAuth = true;
+                }
+            }
 
             // make the HTTP request
             var localVarResponse = await this.AsynchronousClient.GetAsync<List<CallTranscriptionMetadata>>("/accounts/{accountId}/calls/{callId}/transcriptions", localVarRequestOptions, this.Configuration, cancellationToken).ConfigureAwait(false);
diff --git a/src/Bandwidth.Standard/Client/ApiClient.cs b/src/Bandwidth.Standard/Client/ApiClient.cs
index 38aff31..381e861 100644
--- a/src/Bandwidth.Standard/Client/ApiClient.cs
+++ b/src/Bandwidth.Standard/Client/ApiClient.cs
@@ -31,6 +31,7 @@
 using RestSharpMethod = RestSharp.Method;
 using FileIO = System.IO.File;
 using Polly;
+using Bandwidth.Standard.Client.Auth;
 using Bandwidth.Standard.Model;
 
 namespace Bandwidth.Standard.Client
@@ -465,6 +466,20 @@ private ApiResponse<T> ExecClient<T>(Func<RestClient, RestResponse<T>> getRespon
             };
             setOptions(clientOptions);
             
+            if (!string.IsNullOrEmpty(configuration.OAuthTokenUrl) &&
+                !string.IsNullOrEmpty(configuration.OAuthClientId) &&
+                !string.IsNullOrEmpty(configuration.OAuthClientSecret) &&
+                configuration.OAuthFlow != null)
+            {
+                clientOptions.Authenticator = new OAuthAuthenticator(
+                    configuration.OAuthTokenUrl,
+                    configuration.OAuthClientId,
+                    configuration.OAuthClientSecret,
+                    configuration.OAuthFlow,
+                    SerializerSettings,
+                    configuration);
+            }
+
             using (RestClient client = new RestClient(clientOptions,
                 configureSerialization: serializerConfig => serializerConfig.UseSerializer(() => new CustomJsonCodec(SerializerSettings, configuration))))
             {
diff --git a/src/Bandwidth.Standard/Client/Auth/OAuthAuthenticator.cs b/src/Bandwidth.Standard/Client/Auth/OAuthAuthenticator.cs
new file mode 100644
index 0000000..a7a4405
--- /dev/null
+++ b/src/Bandwidth.Standard/Client/Auth/OAuthAuthenticator.cs
@@ -0,0 +1,106 @@
+/*
+ * Bandwidth
+ *
+ * Bandwidth's Communication APIs
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Contact: letstalk@bandwidth.com
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using System;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+using RestSharp;
+using RestSharp.Authenticators;
+
+namespace Bandwidth.Standard.Client.Auth
+{
+    /// <summary>
+    /// An authenticator for OAuth2 authentication flows
+    /// </summary>
+    public class OAuthAuthenticator : AuthenticatorBase
+    {
+        readonly string _tokenUrl;
+        readonly string _clientId;
+        readonly string _clientSecret;
+        readonly string _grantType;
+        readonly JsonSerializerSettings _serializerSettings;
+        readonly IReadableConfiguration _configuration;
+
+        /// <summary>
+        /// Initialize the OAuth2 Authenticator
+        /// </summary>
+        public OAuthAuthenticator(
+            string tokenUrl,
+            string clientId,
+            string clientSecret,
+            OAuthFlow? flow,
+            JsonSerializerSettings serializerSettings,
+            IReadableConfiguration configuration) : base("")
+        {
+            _tokenUrl = tokenUrl;
+            _clientId = clientId;
+            _clientSecret = clientSecret;
+            _serializerSettings = serializerSettings;
+            _configuration = configuration;
+
+            switch (flow)
+            {
+                /*case OAuthFlow.ACCESS_CODE:
+                    _grantType = "authorization_code";
+                    break;
+                case OAuthFlow.IMPLICIT:
+                    _grantType = "implicit";
+                    break;
+                case OAuthFlow.PASSWORD:
+                    _grantType = "password";
+                    break;*/
+                case OAuthFlow.APPLICATION:
+                    _grantType = "client_credentials";
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        /// <summary>
+        /// Creates an authentication parameter from an access token.
+        /// </summary>
+        /// <param name="accessToken">Access token to create a parameter from.</param>
+        /// <returns>An authentication parameter.</returns>
+        protected override async ValueTask<Parameter> GetAuthenticationParameter(string accessToken)
+        {
+            var token = string.IsNullOrEmpty(Token) ? await GetToken().ConfigureAwait(false) : Token;
+            return new HeaderParameter(KnownHeaders.Authorization, token);
+        }
+
+        /// <summary>
+        /// Gets the token from the OAuth2 server.
+        /// </summary>
+        /// <returns>An authentication token.</returns>
+        async Task<string> GetToken()
+        {
+            var client = new RestClient(_tokenUrl,
+                configureSerialization: serializerConfig => serializerConfig.UseSerializer(() => new CustomJsonCodec(_serializerSettings, _configuration)));
+
+            var request = new RestRequest()
+                .AddParameter("grant_type", _grantType)
+                .AddParameter("client_id", _clientId)
+                .AddParameter("client_secret", _clientSecret);
+            var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
+            
+            // RFC6749 - token_type is case insensitive.
+            // RFC6750 - In Authorization header Bearer should be capitalized.
+            // Fix the capitalization irrespective of token_type casing.
+            switch (response.TokenType?.ToLower())
+            {
+                case "bearer":
+                    return $"Bearer {response.AccessToken}";
+                default:
+                    return $"{response.TokenType} {response.AccessToken}";
+            }
+        }
+    }
+}
diff --git a/src/Bandwidth.Standard/Client/Auth/OAuthFlow.cs b/src/Bandwidth.Standard/Client/Auth/OAuthFlow.cs
new file mode 100644
index 0000000..b595b8e
--- /dev/null
+++ b/src/Bandwidth.Standard/Client/Auth/OAuthFlow.cs
@@ -0,0 +1,28 @@
+/*
+ * Bandwidth
+ *
+ * Bandwidth's Communication APIs
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Contact: letstalk@bandwidth.com
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+namespace Bandwidth.Standard.Client.Auth
+{
+    /// <summary>
+    /// Available flows for OAuth2 authentication
+    /// </summary>
+    public enum OAuthFlow
+    {
+        /// <summary>Authorization code flow</summary>
+        ACCESS_CODE,
+        /// <summary>Implicit flow</summary>
+        IMPLICIT,
+        /// <summary>Password flow</summary>
+        PASSWORD,
+        /// <summary>Client credentials flow</summary>
+        APPLICATION
+    }
+}
\ No newline at end of file
diff --git a/src/Bandwidth.Standard/Client/Auth/TokenResponse.cs b/src/Bandwidth.Standard/Client/Auth/TokenResponse.cs
new file mode 100644
index 0000000..56e84de
--- /dev/null
+++ b/src/Bandwidth.Standard/Client/Auth/TokenResponse.cs
@@ -0,0 +1,23 @@
+/*
+ * Bandwidth
+ *
+ * Bandwidth's Communication APIs
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Contact: letstalk@bandwidth.com
+ * Generated by: https://github.com/openapitools/openapi-generator.git
+ */
+
+
+using Newtonsoft.Json;
+
+namespace Bandwidth.Standard.Client.Auth
+{
+    class TokenResponse
+    {
+        [JsonProperty("token_type")]
+        public string TokenType { get; set; }
+        [JsonProperty("access_token")]
+        public string AccessToken { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/Bandwidth.Standard/Client/Configuration.cs b/src/Bandwidth.Standard/Client/Configuration.cs
index a5d0bb3..9a73986 100644
--- a/src/Bandwidth.Standard/Client/Configuration.cs
+++ b/src/Bandwidth.Standard/Client/Configuration.cs
@@ -20,6 +20,7 @@
 using System.Text;
 using System.Net.Http;
 using System.Net.Security;
+using Bandwidth.Standard.Client.Auth;
 
 namespace Bandwidth.Standard.Client
 {
@@ -876,6 +877,30 @@ public string GetApiKeyWithPrefix(string apiKeyIdentifier)
         /// <value>The access token.</value>
         public virtual string AccessToken { get; set; }
 
+        /// <summary>
+        /// Gets or sets the token URL for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Token URL.</value>
+        public virtual string OAuthTokenUrl { get; set; }
+
+        /// <summary>
+        /// Gets or sets the client ID for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client ID.</value>
+        public virtual string OAuthClientId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the client secret for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Secret.</value>
+        public virtual string OAuthClientSecret { get; set; }
+
+        /// <summary>
+        /// Gets or sets the flow for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Flow.</value>
+        public virtual OAuthFlow? OAuthFlow { get; set; }
+
         /// <summary>
         /// Gets or sets the temporary folder path to store the files downloaded from the server.
         /// </summary>
@@ -1195,6 +1220,10 @@ public static IReadableConfiguration MergeConfigurations(IReadableConfiguration
                 Username = second.Username ?? first.Username,
                 Password = second.Password ?? first.Password,
                 AccessToken = second.AccessToken ?? first.AccessToken,
+                OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
+                OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
+                OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
                 ClientCertificates = second.ClientCertificates ?? first.ClientCertificates,
diff --git a/src/Bandwidth.Standard/Client/IReadableConfiguration.cs b/src/Bandwidth.Standard/Client/IReadableConfiguration.cs
index d910c14..587ae85 100644
--- a/src/Bandwidth.Standard/Client/IReadableConfiguration.cs
+++ b/src/Bandwidth.Standard/Client/IReadableConfiguration.cs
@@ -14,6 +14,7 @@
 using System.Net;
 using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
+using Bandwidth.Standard.Client.Auth;
 
 namespace Bandwidth.Standard.Client
 {
@@ -28,6 +29,30 @@ public interface IReadableConfiguration
         /// <value>Access token.</value>
         string AccessToken { get; }
 
+        /// <summary>
+        /// Gets the OAuth token URL.
+        /// </summary>
+        /// <value>OAuth Token URL.</value>
+        string OAuthTokenUrl { get; }
+
+        /// <summary>
+        /// Gets the OAuth client ID.
+        /// </summary>
+        /// <value>OAuth Client ID.</value>
+        string OAuthClientId { get; }
+
+        /// <summary>
+        /// Gets the OAuth client secret.
+        /// </summary>
+        /// <value>OAuth Client Secret.</value>
+        string OAuthClientSecret { get; }
+
+        /// <summary>
+        /// Gets the OAuth flow.
+        /// </summary>
+        /// <value>OAuth Flow.</value>
+        OAuthFlow? OAuthFlow { get; }
+
         /// <summary>
         /// Gets the API key.
         /// </summary>
diff --git a/src/Bandwidth.Standard/Client/RequestOptions.cs b/src/Bandwidth.Standard/Client/RequestOptions.cs
index e7b6d04..e11610d 100644
--- a/src/Bandwidth.Standard/Client/RequestOptions.cs
+++ b/src/Bandwidth.Standard/Client/RequestOptions.cs
@@ -69,6 +69,11 @@ public class RequestOptions
         /// </summary>
         public Object Data { get; set; }
 
+        /// <summary>
+        /// If request should be authenticated with OAuth.
+        /// </summary>
+        public bool OAuth { get; set; }
+
         /// <summary>
         /// Constructs a new instance of <see cref="RequestOptions"/>
         /// </summary>