code: def _not_authenticated(self):
          
          self._authenticator = None
  
          if api_settings.UNAUTHENTICATED_USER:
              self.user = api_settings.UNAUTHENTICATED_USER()
          else:
              self.user = None
  
          if api_settings.UNAUTHENTICATED_TOKEN:
              self.auth = api_settings.UNAUTHENTICATED_TOKEN()
          else:
              self.auth = None
docs: Return a three-tuple of (authenticator, user, authtoken), representing
          an unauthenticated request.
  
          By default this will be (None, AnonymousUser, None).