public static function receive($input = null)
    {
        if (is_null($input)) {
            if (self::$receivedWebhook !== null) {
                $input = self::$receivedWebhook;
            } else {
                $input = file_get_contents("php://input");
            }
        }

        if (!is_null($input) && $input != '') {
            return self::processWebhook($input);
        }

        return false;
    }