title: How can i get the userID of the youtube account?
body: <p>I want to get the users youtube usedID. After successfully login with youTubeService. On the <code>viewController:finishedWithAuth:error:</code> userID returns nil.</p>
  
  <pre><code>Code
  
  - (void)viewController:(GTMOAuth2ViewControllerTouch *)viewController
            finishedWithAuth:(GTMOAuth2Authentication *)auth
                       error:(NSError *)error
      {
          [viewController dismissViewControllerAnimated:YES completion:NULL];
          if(error != nil){
              NSLog(@"Authentication error: %@", error);
          }
          else {
              // Authentication succeeded...
              NSLog(@"%@",auth.accessToken);
              NSLog(@"%@",auth.userID); //returns nil
          }
      }
  </code></pre>
  
  <p><strong>Please note that I am not asking Google email ID I want to get youtube user id.</strong></p>