public ViewResult Update(IndexViewModel ivm)
        {
            if (!ModelState.IsValid)
            {
                return View("Index");
            }

            gebruikerService.UpdateGegevens(ivm.Email, ivm.Tel, ivm.Gsm);
            ViewBag.StatusMessage = "Gegevens opgeslagen";

            return View("Index", ivm);
        }
        //
        // GET: /Manage/Index
        public async Task<ActionResult> Index(ManageMessageId? message)
        {
            ViewBag.StatusMessage =
                message == ManageMessageId.ChangePasswordSuccess ? "Your password has been changed."
                : message == ManageMessageId.SetPasswordSuccess ? "Your password has been set."
                : message == ManageMessageId.SetTwoFactorSuccess ? "Your two-factor authentication provider has been set."
                : message == ManageMessageId.Error ? "An error has occurred."
                : message == ManageMessageId.AddPhoneSuccess ? "Your phone number was added."
                : message == ManageMessageId.RemovePhoneSuccess ? "Your phone number was removed."
                : "";

            Gebruiker loggedIn = gebruikerService.LoggedIn();

            var userId = User.Identity.GetUserId();
            var model = new IndexViewModel
            {
                Email = loggedIn.Email,
                Tel = loggedIn.Tel,
                Gsm = loggedIn.Gsm
            };
            return View(model);
        }