Add instance timeout (#253)

- add instance level timeout, `New-ServiceNowSession -TimeoutSec`

Author: gdbarron

ServiceNow/Private/Invoke-ServiceNowRestMethod.ps1

@@ -138,12 +138,6 @@ function Invoke-ServiceNowRestMethod {
         $params.Body = [System.Text.Encoding]::UTf8.GetBytes($Body)
     }
 
-    # if ( $Body ) {
-    #     $params.Body = $Body
-    # }
-
-    # Write-Verbose ($params | ConvertTo-Json)
-
     # hide invoke-webrequest progress
     $oldProgressPreference = $ProgressPreference
     $ProgressPreference = 'SilentlyContinue'

ServiceNow/Public/New-ServiceNowSession.ps1

@@ -35,6 +35,10 @@ Use GraphQL instead of REST calls
 .PARAMETER GetAllTable
 Populate $ServiceNowTable with data from all tables the user has access to
 
+.PARAMETER TimeoutSec
+Timeout in seconds for all operations.
+The default is 0 which represents no timeout.
+
 .PARAMETER PassThru
 Provide the resulting session object to the pipeline as opposed to setting as a script scoped variable to be used by default for other calls.
 This is useful if you want to have multiple sessions with different api versions, credentials, etc.
@@ -119,6 +123,10 @@ function New-ServiceNowSession {
         [Parameter()]
         [switch] $GraphQL,
 
+        [Parameter()]
+        [ValidateRange(0, [int32]::MaxValue)]
+        [int32] $TimeoutSec = 0,
+
         [Parameter()]
         [switch] $PassThru
     )
@@ -148,6 +156,9 @@ function New-ServiceNowSession {
         }
     }
 
+    $script:PSDefaultParameterValues['Invoke-WebRequest:TimeoutSec'] = $TimeoutSec
+    $script:PSDefaultParameterValues['Invoke-RestMethodt:TimeoutSec'] = $TimeoutSec
+
     switch -Wildcard ($PSCmdLet.ParameterSetName) {
         'OAuth*' {
             $params = @{