php创建存储桶时提示access denied

$cosClient = new Qcloud\Cos\Client(array(

'region' => 'ap-guangzhou', #地域，如ap-guangzhou,ap-beijing-1

'credentials' => array(

'secretId' => '',

'secretKey' => '',

),

));

//获取 bucket 列表

var_dump($cosClient->listBuckets());

# 创建bucket--fail

try {

$result = $cosClient->createBucket(array('Bucket' => "kingck"));

print_r($result);

} catch (\Exception $e) {

echo($e);

}

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获取bucket列表是正常的。但创建bucket会报错