adds overload to specify custom backoffice user store for custom implementations (i.e. 2 factor auth, etc...)

src/Umbraco.Core/Security/BackOfficeUserManager.cs

@@ -61,20 +61,58 @@ namespace Umbraco.Core.Security
         } 
         #endregion
 
+        /// <summary>
+        /// Creates a BackOfficeUserManager instance with all default options and the default BackOfficeUserManager 
+        /// </summary>
+        /// <param name="options"></param>
+        /// <param name="userService"></param>
+        /// <param name="externalLoginService"></param>
+        /// <param name="membershipProvider"></param>
+        /// <returns></returns>
         public static BackOfficeUserManager Create(
             IdentityFactoryOptions<BackOfficeUserManager> options,
-            IOwinContext context,
             IUserService userService,
             IExternalLoginService externalLoginService,
             MembershipProviderBase membershipProvider)
         {
             if (options == null) throw new ArgumentNullException("options");
-            if (context == null) throw new ArgumentNullException("context");
             if (userService == null) throw new ArgumentNullException("userService");
             if (externalLoginService == null) throw new ArgumentNullException("externalLoginService");
 
             var manager = new BackOfficeUserManager(new BackOfficeUserStore(userService, externalLoginService, membershipProvider));
 
+            return InitUserManager(manager, membershipProvider, options);
+        }
+
+        /// <summary>
+        /// Creates a BackOfficeUserManager instance with all default options and a custom BackOfficeUserManager instance
+        /// </summary>
+        /// <param name="options"></param>
+        /// <param name="customUserStore"></param>
+        /// <param name="membershipProvider"></param>
+        /// <returns></returns>
+        public static BackOfficeUserManager Create(
+           IdentityFactoryOptions<BackOfficeUserManager> options,
+           BackOfficeUserStore customUserStore,
+           MembershipProviderBase membershipProvider)
+        {
+            if (options == null) throw new ArgumentNullException("options");
+            if (customUserStore == null) throw new ArgumentNullException("customUserStore");
+
+            var manager = new BackOfficeUserManager(customUserStore);
+
+            return InitUserManager(manager, membershipProvider, options);
+        }
+
+        /// <summary>
+        /// Initializes the user manager with the correct options
+        /// </summary>
+        /// <param name="manager"></param>
+        /// <param name="membershipProvider"></param>
+        /// <param name="options"></param>
+        /// <returns></returns>
+        private static BackOfficeUserManager InitUserManager(BackOfficeUserManager manager, MembershipProviderBase membershipProvider, IdentityFactoryOptions<BackOfficeUserManager> options)
+        {
             // Configure validation logic for usernames
             manager.UserValidator = new UserValidator<BackOfficeIdentityUser, int>(manager)
             {
@@ -102,7 +140,7 @@ namespace Umbraco.Core.Security
             }
 
             //custom identity factory for creating the identity object for which we auth against in the back office
-            manager.ClaimsIdentityFactory = new BackOfficeClaimsIdentityFactory();            
+            manager.ClaimsIdentityFactory = new BackOfficeClaimsIdentityFactory();
 
             //NOTE: Not implementing these, if people need custom 2 factor auth, they'll need to implement their own UserStore to suport it
 

src/Umbraco.Web.UI.Client/src/views/common/dialogs/user.html

@@ -30,7 +30,7 @@
                 </p>
             </div>
 
-            <div class="umb-pane external-logins">
+            <div class="umb-pane external-logins" ng-if="externalLoginProviders.length > 0">
 
                 <h5>External login providers</h5>
 

src/Umbraco.Web/Security/Identity/AppBuilderExtensions.cs

@@ -17,8 +17,9 @@ namespace Umbraco.Web.Security.Identity
     public static class AppBuilderExtensions
     {
         #region Backoffice
+
         /// <summary>
-        /// Configure Identity User Manager for Umbraco
+        /// Configure Default Identity User Manager for Umbraco
         /// </summary>
         /// <param name="app"></param>
         /// <param name="appContext"></param>
@@ -36,12 +37,36 @@ namespace Umbraco.Web.Security.Identity
             app.CreatePerOwinContext<BackOfficeUserManager>(
                 (options, owinContext) => BackOfficeUserManager.Create(
                     options,
-                    owinContext,
                     appContext.Services.UserService,
                     appContext.Services.ExternalLoginService,
                     userMembershipProvider));
         }
 
+        /// <summary>
+        /// Configure a custom UserStore with the Identity User Manager for Umbraco
+        /// </summary>
+        /// <param name="app"></param>
+        /// <param name="appContext"></param>
+        /// <param name="userMembershipProvider"></param>
+        /// <param name="customUserStore"></param>
+        public static void ConfigureUserManagerForUmbracoBackOffice(this IAppBuilder app,
+            ApplicationContext appContext,
+            MembershipProviderBase userMembershipProvider,
+            BackOfficeUserStore customUserStore)
+        {
+            //Don't proceed if the app is not ready
+            if (appContext.IsConfigured == false
+                || appContext.DatabaseContext == null
+                || appContext.DatabaseContext.IsDatabaseConfigured == false) return;
+
+            //Configure Umbraco user manager to be created per request
+            app.CreatePerOwinContext<BackOfficeUserManager>(
+                (options, owinContext) => BackOfficeUserManager.Create(
+                    options,
+                    customUserStore,
+                    userMembershipProvider));
+        }
+
         /// <summary>
         /// Ensures that the UmbracoBackOfficeAuthenticationMiddleware is assigned to the pipeline
         /// </summary>