教程中的错误

public function update(AuthorizationServer $server, ServerRequestInterface $serverRequest)
{
  try {
  return $server->respondToAccessTokenRequest($serverRequest, new Psr7Response);
  } catch(OAuthServerException $e) {
  return $this->response->errorUnauthorized($e->getMessage());
  }
}

教程update中这一段是错误的,没有定义response

return $this->response->errorUnauthorized($e->getMessage());

改为

 throw new AuthenticationException($e->getMessage());