cdn获取域名返回问题Forbidden.RAM

include_once('aliyun-php-sdk-core' . DIRECTORY_SEPARATOR . 'Config.php');

use Cdn\Request\V20141111 as Cdn;

class Aliyun
{

    public $client = '';

    //$accessKeyId，$accessSecret为阿里云密钥
    function __construct()
    {
        $config = \CConfig::get('alioss');
        //$config['AccessKeyID']=$accessKeyId，$accessSecret为阿里云密钥
        $iClientProfile = DefaultProfile::getProfile("cn-hangzhou", $config['AccessKeyID'], $config['AccessKeySecret']);

        $this->client = new DefaultAcsClient($iClientProfile);

    }

public function getDomains()
{
    $request=new Cdn\DescribeUserDomainsRequest();
    //$request->setAcceptFormat('JSON');
    $response = $this->client->getAcsResponse($request);
    return $response;
}

2018-09-27 14:37:28] Forbidden.RAM User not authorized to operate on the specified resource, or this API doesn't support RAM. HTTP Status: 403 RequestID: 7178954F-487B-4F45-85AA-9CEAB459E299