final SamlUser samlUser = (SamlUser) user.getFessUser();
                try {
                    final Saml2Settings settings = getSettings();
                    if (settings.getIdpSingleLogoutServiceUrl() == null) {
                        if (logger.isDebugEnabled()) {
                            logger.debug("IdP single logout service URL is not configured, skipping SLO for user: {}", samlUser);