protected function exec($query)
    {
        try {
            Connect::getConn()->exec($query);
        } catch (Exception $e) {
            static::$response["status"] = "error";
            static::$response["response"] = $e->getMessage();
            static::$response["code"] = $e->getCode();

            return static::terminate(static::$response);
        }
        return null;
    }