Mailgun\Resource\Api\Domain\CredentialResponse::create PHP Метод

    public static function create(array $data)
    {
        if (array_key_exists('items', $data) && array_key_exists('total_count', $data)) {
            $items = [];
            foreach ($data['items'] as $item) {
                $items[] = CredentialResponseItem::create($item);
            }
            return new self($data['total_count'], $items);
        } else {
            return ErrorResponse::create($data);
        }
    }