七牛云删除图片一直失败，求大神指点

错误码是：object(Qiniu_Error)#9 (4) { ["Err"]=> NULL ["Reqid"]=> string(16) "_DcAAJMoxFtGO5UT" ["Details"]=> string(0) "" ["Code"]=> int(401) }


require_once("qiniu/rs.php");
$bucket = "phpsdk";
$key1 = "file_name1";
$accessKey = '';
$secretKey = '';

Qiniu_SetKeys($accessKey, $secretKey);
$client = new Qiniu_MacHttpClient(null);

$err = Qiniu_RS_Delete($client, $bucket, $key1);
echo "====> Qiniu_RS_Delete result: \n";
if ($err !== null) {
var_dump($err);
} else {
echo "Success!";
}

我想请问一下。key1是文件名吗？是不是要写全路径？

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