diff --git a/src/login.ts b/src/login.ts
index 21b6478a..a0176609 100644
--- a/src/login.ts
+++ b/src/login.ts
@@ -74,6 +74,7 @@ export class CustomAuth {
     serverTimeOffset = 0,
     nodeDetails,
     checkCommitment = true,
+    source = "customauth",
   }: CustomAuthArgs) {
     if (!web3AuthClientId) throw new Error("Please provide a valid web3AuthClientId in constructor");
     if (!network) throw new Error("Please provide a valid network in constructor");
@@ -105,6 +106,7 @@ export class CustomAuth {
       legacyMetadataHost: metadataUrl,
       keyType,
       buildEnv,
+      source,
     });
     Torus.setAPIKey(apiKey);
     this.torus = torus;
diff --git a/src/utils/interfaces.ts b/src/utils/interfaces.ts
index 859d8aac..f31bb39f 100644
--- a/src/utils/interfaces.ts
+++ b/src/utils/interfaces.ts
@@ -247,6 +247,12 @@ export interface CustomAuthArgs {
    * @defaultValue true
    */
   checkCommitment?: boolean;
+
+  /**
+   * Source of the login
+   * @defaultValue "customauth"
+   */
+  source?: string;
 }
 
 export interface InitParams {