$dsn, 'username' => $username, 'password' => $password)); // 通过存储对象或对象数组存储的oauth2服务器类 $server = new OAuth2\Server($storage); // 授权码 有效期只有30秒 $server->addGrantType(new OAuth2\GrantType\AuthorizationCode($storage)); // 客户端证书 $server->addGrantType(new OAuth2\GrantType\ClientCredentials($storage)); // 用户凭据 $server->addGrantType(new OAuth2\GrantType\UserCredentials($storage)); // 刷新令牌 启用这个会报错，原因未知 $server->addGrantType(new OAuth2\GrantType\RefreshToken($refreshStorage));