code: def __initialize_instance(self):
          
          config = self.config
  
          # Initialize instance of the Authentication class
          self.instance.auth = self.authentication_class(self.app, config=config)
  
          init_handlers = (
              handlers if config.auth_mode() else auth_mode_agnostic_handlers
          )
  
          for handler in init_handlers:
              if handler.keys is None:
                  self.__check_method_in_auth(handler.name, handler.exception)
              else:
                  if all(map(config.get, handler.keys)):
                      self.__check_method_in_auth(
                          handler.name, handler.exception
                      )
  
          for handler in init_handlers:
              if handler.name in self.kwargs:
                  method = self.kwargs.pop(handler.name)
                  setattr(self.instance.auth, handler.name, method)
docs: Take any predefined methods/handlers and insert them into Sanic JWT