接口返回401，我是在是找不到原因，麻烦帮忙看一下

[weadwe01]

// 下面的xxx我确定是没有错的，直接复制京东云Access Key管理里面的

  $cred   = new Credentials('xxx', 'xxx');
          $client = new StarshieldClient([
              'credentials' => $cred,
              'version'     => 'latest',
              'scheme'      => 'http',
          ]);
          $result = $client->listOfFirewallRules();
          //         VmClient

        var_dump($result);

// 错误信息是下面这样的

Error executing "ListOfFirewallRules" on "http://starshield.jdcloud-api.com/v1/zones/%7Bzone_identifier%7D/firewall$$rules"; Jdcloud HTTP error: Client error: `GET http://starshield.jdcloud-api.com/v1/zones/%7Bzone_identifier%7D/firewall$$rules` resulted in a `401 Unauthorized` response:
{"error":{"message":"sign result is not same [gw]","status":"ACCESS_ERROR","code":401},"requestId":"ce6ttm6ir2hu3mutbkdp (truncated...)
 401 (client): sign result is not same [gw] - {"error":{"message":"sign result is not same [gw]","status":"ACCESS_ERROR","code":401},"requestId":"ce6ttm6ir2hu3mutbkdpr7j3iecwh77q"}