public function userHasUnsubscribed($iUSerId, $sType)
    {
        $oDb = Factory::service('Database');
        $oDb->where('user_id', $iUSerId);
        $oDb->where('type', $sType);
        return (bool) $oDb->count_all_results(NAILS_DB_PREFIX . 'user_email_blocker');
    }