public function register($user)
    {
        if (!$user) {
            return false;
        }

        global $mybb,$db, $session, $plugins, $lang;

        require_once MYBB_ROOT . "inc/datahandlers/user.php";
        $userhandler = new UserDataHandler("insert");
        $referrername = null;
        $new_user = null;
        if($mybb->settings['usereferrals'] == 1 && !$mybb->user['uid'])
        {
            if(isset($mybb->cookies['mybb']['referrer']))
                {
                    $query = $db->simple_select("users", "uid,username", "uid='".(int)$mybb->cookies['mybb']['referrer']."'");
                    $ref = $db->fetch_array($query);
                    $ref['username'] = htmlspecialchars_uni($ref['username']);
                    $referrername = $ref['username'];
            }
        }
        if(isset($referrername)){
            $new_user = [
            "username" => htmlspecialchars_uni($user['displayName']),
            "regip" => $session->ipaddress,
            "profile_fields" => (array) $user['profile_fields'],
            "longregip" => my_ip2long($session->ipaddress),
            "referrer" => $referrername,
            "options" => [
                "hideemail" => 1
            ]
        ];
        } else {

            $new_user = [
            "username" => htmlspecialchars_uni($user['displayName']),
            "regip" => $session->ipaddress,
            "profile_fields" => (array) $user['profile_fields'],
            "longregip" => my_ip2long($session->ipaddress),
            "options" => [
                "hideemail" => 1
            ]
        ];