if strempty($avp(s:authType)) {
                        if !strempty($au) { #Check pwd auth
                                if ( !redis_cmd("srv1", "HMGET sipendpoint:$td:$au password ep_type max-cpm max-cpc passthru_cli default_clid enabled", "ep") ) {
                                        xlog("WARNING: REDIS querying on endpoint auth pwd failed!");
                                        sl_send_reply("503","Storage error");
                                        exit;
                                } else if ( $redis(ep=>size)==0 ) { #Query returned empty result, there should be no record found
                                        sl_send_reply("403","Invalid credentials");
                                        exit;
                                } else if ( $redis(ep=>value[6]) eq 0 ) {
                                        sl_send_reply("403","Disabled endpoint");
                                        exit;
                                } else if strempty($redis(ep=>value[0])) {
                                        sl_send_reply("403","Invalid credentials");
                                        exit;
                                }
                        }
                        if (is_method("REGISTER")) {
                                if ( strempty($au) || !pv_www_authenticate("$td", "$redis(ep=>value[0])", "0") ) {
                                        www_challenge("$td", "0");
                                        exit;
                                }
                                if ($au!=$tU) {
                                        sl_send_reply("403","Forbidden auth ID");
                                        exit;
                                }
                        }

                        $avp(s:authEndpoint) = $au;
                        return;
        }