docs: def Handle(self, unused_args, token=None):
      """Fetches and renders current user's settings."""
  
      result = ApiGrrUser(username=token.username)
  
      if data_store.RelationalDBEnabled():
        user_record = data_store.REL_DB.ReadGRRUser(token.username)
        result.InitFromDatabaseObject(user_record)
      else:
        try:
          user_record = aff4.FACTORY.Open(
              aff4.ROOT_URN.Add("users").Add(token.username),
              aff4_users.GRRUser,
              token=token)
  
          result.InitFromAff4Object(user_record)
        except IOError:
          result.settings = aff4_users.GRRUser.SchemaCls.GUI_SETTINGS()
  
      result.interface_traits = (
          self.interface_traits or ApiGrrUserInterfaceTraits())
  
      return result