added mongodb mvc sample

sample/MongoIdentitySample.Mvc/Models/ManageViewModels/ManageLoginsViewModel.cs

@@ -0,0 +1,13 @@
+using System.Collections.Generic;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Identity;
+
+namespace MongoIdentitySample.Mvc.Models.ManageViewModels
+{
+    public class ManageLoginsViewModel
+    {
+        public IList<UserLoginInfo> CurrentLogins { get; set; }
+
+        public IList<AuthenticationScheme> OtherLogins { get; set; }
+    }
+}