title: GCP Cloud IAP OAuth2: Expected JWT to have 3 parts separated by a '.' but there are 2 parts
body: <p>I've secured a Google App Engine Application behind Cloud IAP - the endpoint now requires Google Sign-in via the browser as expected and works fine once I've added the right permissions. However, when I try to use Postman / MS PowerApps OAuth2 authentication I get the following error: Expected JWT to have 3 parts separated by a '.' but there are 2 parts.</p>
  
  <p>Here are my Postman settings:</p>
  
  <pre><code>Grant Type: Authorization Code
  
  Callback URL: Authed Callback URL (added to list in console)
  
  Auth URL: https://accounts.google.com/o/oauth2/auth
  
  Access Token URL: https://accounts.google.com/o/oauth2/token
  
  Client ID: IAP-App-Engine-app ClientID
  
  Client Secret:  IAP-App-Engine-app Client Secret
  
  Scope: openid email
  
  Client Authentication: Send as Basic Auth Header
  </code></pre>
  
  <p>Is there a solution for Cloud IAP OAuth2?</p>
  
  <p>Thanks,</p>