public function GetLinkLogout($sSpotName)
    {
        $oGlobal = TGlobal::instance();
        // if we are on the last page of checkout process we can't use the active page url for logout
        // so we redirect to the home url with logout method as parameter
        if ($oGlobal->UserDataExists(MTShopOrderWizardCore::URL_PARAM_STEP_SYSTEM_NAME) && 'thankyou' == $oGlobal->GetUserData(MTShopOrderWizardCore::URL_PARAM_STEP_SYSTEM_NAME)) {
            return self::getPageService()->getLinkToPortalHomePageAbsolute().'?'.TTools::GetArrayAsURL(array('module_fnc['.$sSpotName.']' => 'Logout'));
        }

        return parent::GetLinkLogout($sSpotName);
    }