code: def _get_gae_credentials():
      
      # While this library is normally bundled with app_engine, there are
      # some cases where it's not available, so we tolerate ImportError.
      try:
          import google.auth.app_engine as app_engine
      except ImportError:
          return None, None
  
      try:
          credentials = app_engine.Credentials()
          project_id = app_engine.get_project_id()
          return credentials, project_id
      except EnvironmentError:
          return None, None
docs: Gets Google App Engine App Identity credentials and project ID.