Adding 2FA Authenticator Support (#66)

* Adding support for 2fa, more auth options

* WIP getting auth stuff working

* Added Manage views. 2FA working now for MVC app.

* Switching to using a controller for no-UI logout scenario

* Adding Razor Pages impl of 2FA auth stuff. Works.

src/Web/Extensions/EmailSenderExtensions.cs

@@ -0,0 +1,15 @@
+using ApplicationCore.Interfaces;
+using System.Text.Encodings.Web;
+using System.Threading.Tasks;
+
+namespace Microsoft.eShopWeb.Services
+{
+    public static class EmailSenderExtensions
+    {
+        public static Task SendEmailConfirmationAsync(this IEmailSender emailSender, string email, string link)
+        {
+            return emailSender.SendEmailAsync(email, "Confirm your email",
+                $"Please confirm your account by clicking this link: <a href='{HtmlEncoder.Default.Encode(link)}'>link</a>");
+        }
+    }
+}

src/Web/Extensions/UrlHelperExtensions.cs

@@ -0,0 +1,25 @@
+using Microsoft.eShopWeb.Controllers;
+
+namespace Microsoft.AspNetCore.Mvc
+{
+    public static class UrlHelperExtensions
+    {
+        public static string EmailConfirmationLink(this IUrlHelper urlHelper, string userId, string code, string scheme)
+        {
+            return urlHelper.Action(
+                action: nameof(AccountController.ConfirmEmail),
+                controller: "Account",
+                values: new { userId, code },
+                protocol: scheme);
+        }
+
+        public static string ResetPasswordCallbackLink(this IUrlHelper urlHelper, string userId, string code, string scheme)
+        {
+            return urlHelper.Action(
+                action: nameof(AccountController.ResetPassword),
+                controller: "Account",
+                values: new { userId, code },
+                protocol: scheme);
+        }
+    }
+}