public ActionResult Index()
        {
            var model = new AdminUsersViewModel();
            var users = userManager.Users
                        .OrderBy(x => x.ShortName)
                        .ToList();

            foreach (var user in users)
            {
                var roles = userManager.GetRolesAsync(user);
                roles.Wait();

                var viewUser = UserListViewModel.FromUser(user);
                viewUser.Roles = roles.Result.ToArray();
                model.Users.Add(viewUser);
            }

            return(View(model));
        }