public ActionResult Login(string returnUrl)
        {
            if(this.ControllerContext.IsChildAction)
            {
                return this.PartialView("Login", new LoginViewModel(returnUrl));
            }

            LoginRegisterViewModel viewModel = new LoginRegisterViewModel(returnUrl);

            return View("Index", viewModel);
        }
        public ActionResult LoginRegister(GuestRegisterForm? showGuestOrRegister)
        {
            LoginRegisterViewModel viewModel = new LoginRegisterViewModel();
            viewModel.ShowGuestOrRegister = showGuestOrRegister;

            return this.View("LoginRegister", viewModel);
        }