我想在Shopify中创建一个自定义webhook，以便客户使用私人应用登录。下面是我的代码，但我得到了错误数组（[errors]=

session_start();

require __DIR__.'/vendor/autoload.php';
use phpish\shopify;

require __DIR__.'/conf.php';

$shopify = shopify\client(SHOPIFY_SHOP, SHOPIFY_APP_API_KEY, SHOPIFY_APP_PASSWORD, true);

try
{
    # Making an API request can throw an exception



    $customers = $shopify('POST /admin/api/2020-01/webhooks.json', array(), array
    (
        'webhook' => array 
        (
            "topic" =>  "customers/login",
            "address" => "myappurl", 
            "format" => "json"
        )

    ));

    print_r($customers);
}
catch (shopify\ApiException $e)
{
    # HTTP status code was >= 400 or response contained the key 'errors'
    echo $e;
    print_R($e->getRequest());
    print_R($e->getResponse());
}
catch (shopify\CurlException $e)
{
    # cURL error
    echo $e;
    print_R($e->getRequest());
    print_R($e->getResponse());
}

请帮助它是可能的，以创建它从私人应用程序或不？