RainLab\User\Components\Session::onLogout PHP Method

    public function onLogout()
    {
        $user = Auth::getUser();
        Auth::logout();
        if ($user) {
            Event::fire('rainlab.user.logout', [$user]);
        }
        $url = post('redirect', Request::fullUrl());
        Flash::success(Lang::get('rainlab.user::lang.session.logout'));
        return Redirect::to($url);
    }