docs: def authenticate_identify(self, api_token, override=True):
          """Set credentials for Identify authentication.
  
          Args:
            api_token (str): Token issued to your Application through the Gem
              Developer Console.
            override (boolean): Replace existing Application credentials.
          """
          if (self.context.has_auth_params('Gem-Identify') and not override):
              raise OverrideError('Gem-Identify')
  
          if (not api_token or
              not self.context.authorize('Gem-Identify', api_token=api_token)):
              raise AuthUsageError(self.context, 'Gem-Identify')
  
          return True