public async Task<ActionResult> ChangeSubscription(ChangeSubscriptionViewModel model)
        {
            if (ModelState.IsValid)
            {
                var user = await UserManager.FindByIdAsync(User.Identity.GetUserId());
                await SubscriptionsFacade.UpdateSubscriptionAsync(user.Id, user.StripeCustomerId, model.NewPlan);

                // TempData.Add("flash", new FlashSuccessViewModel("Your subscription plan has been updated."));
            }
            else
            {
                // TempData.Add("flash", new FlashSuccessViewModel("Sorry, there was an error updating your plan, try again or contact support."));
            }

            return RedirectToAction("Index");
        }
        public async Task<ViewResult> ChangeSubscription()
        {
            var currentSubscription = (await SubscriptionsFacade.UserActiveSubscriptionsAsync(User.Identity.GetUserId())).FirstOrDefault();

            var model = new ChangeSubscriptionViewModel
            {
                SubscriptionPlans = await SubscriptionPlansFacade.GetAllAsync(),
                CurrentSubscription = currentSubscription != null ? currentSubscription.SubscriptionPlan.Id : string.Empty
            };

            return View(model);
        }