public function getIPaymentUser()
    {
        if ($this->_sIPaymentUser === null) {
            $this->_sIPaymentUser = false;
            $this->_sIPaymentUser = \OxidEsales\Eshop\Core\Registry::getConfig()->getConfigParam('iShopID_iPayment_User');
        }

        return $this->_sIPaymentUser;
    }