public async Task<ActionResult> ExternalLoginConfirmation(ExternalLoginConfirmationViewModel model, string returnUrl)
        {
            if (User.Identity.IsAuthenticated)
            {
                return RedirectToAction("Index", "Manage");
            }

            if (ModelState.IsValid)
            {
                // Get the information about the user from the external login provider
                var info = await AuthenticationManager.GetExternalLoginInfoAsync();
                if (info == null)
                {
                    return View("ExternalLoginFailure");
                }
                var user = new ApplicationUser { 
                    UserName = model.Email,
                    Email = model.Email,
                    Age = model.Age,
                    State  = model.State,
                    Role = Roles.Customer };
                var result = await UserManager.CreateAsync(user);
                if (result.Succeeded)
                {
                    result = await UserManager.AddLoginAsync(user.Id, info.Login);
                    if (result.Succeeded)
                    {
                        await UserManager.AddToRoleAsync(user.Id, "isOwner");
                        await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false);
                        return RedirectToLocal(returnUrl);
                    }
                }
                AddErrors(result);
            }

            ViewBag.ReturnUrl = returnUrl;
            return View(model);
        }
        public async Task<ActionResult> Register(RegisterViewModel model)
        {
            if (ModelState.IsValid)
            {
                var user = new ApplicationUser { UserName = model.UserName, Age = model.Age, Role = model.Role, State = model.State };

                using (var dbContextTransaction = context.Database.BeginTransaction())
                {
                    try
                    {
                        ApplicationUser existing = context.Users.Where(u => u.UserName == model.UserName).FirstOrDefault();

                        if (existing != null)
                        {
                            ModelState.AddModelError("", "The user already exists.");
                        }
                        else
                        {

                            var result = await UserManager.CreateAsync(user, ApplicationUser.GenericPassword);

                            if (result.Succeeded)
                            {
                                if (user.Role == Roles.Owner)
                                {
                                    UserManager.AddToRole(user.Id, "isOwner");
                                }

                                MigrateShoppingCart(model.UserName);


                                await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false);

                                // For more information on how to enable account confirmation and password reset please visit http://go.microsoft.com/fwlink/?LinkID=320771
                                // Send an email with this link
                                // string code = await UserManager.GenerateEmailConfirmationTokenAsync(user.Id);
                                // var callbackUrl = Url.Action("ConfirmEmail", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
                                // await UserManager.SendEmailAsync(user.Id, "Confirm your account", "Please confirm your account by clicking <a href=\"" + callbackUrl + "\">here</a>");
                                dbContextTransaction.Commit();

                                return RedirectToAction("Index", "Home", new { message = "You have sucessfully signed up!" });
                            }
                            AddErrors(result);
                        }


                    }
                    catch (Exception)
                    {
                        dbContextTransaction.Rollback();
                    }

                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }