public function loadUserByUpdateId($sUid)
    {
        $oDb = \OxidEsales\Eshop\Core\DatabaseProvider::getDb();
        $sQ = "select oxid from " . $this->getViewName() . " where oxupdateexp >= " . time() . " and MD5( CONCAT( oxid, oxshopid, oxupdatekey ) ) = " . $oDb->quote($sUid);
        if ($sUserId = $oDb->getOne($sQ)) {
            return $this->load($sUserId);
        }
    }