code: def __check_deprecated(self):
          
          # Depracation notices
          if "SANIC_JWT_HANDLER_PAYLOAD_SCOPES" in self.app.config:
              raise exceptions.InvalidConfiguration(
                  "SANIC_JWT_HANDLER_PAYLOAD_SCOPES has been deprecated. "
                  "Instead, pass your handler method (not an import path) as "
                  "initialize(add_scopes_to_payload=my_scope_extender)"
              )
  
          if "SANIC_JWT_PAYLOAD_HANDLER" in self.app.config:
              raise exceptions.InvalidConfiguration(
                  "SANIC_JWT_PAYLOAD_HANDLER has been deprecated. "
                  "Instead, you will need to subclass Authentication. "
              )
  
          if "SANIC_JWT_HANDLER_PAYLOAD_EXTEND" in self.app.config:
              raise exceptions.InvalidConfiguration(
                  "SANIC_JWT_HANDLER_PAYLOAD_EXTEND has been deprecated. "
                  "Instead, you will need to subclass Authentication. "
                  "Check out the documentation for more information."
              )
docs: Checks for deprecated configuration keys