public async Task <IActionResult> UpdateRoleUsers(List <UserRoleViewModel> model, string roleId)
        {
            var role = await accountManager.GetRole(roleId);

            for (int i = 0; i < model.Count(); i++)
            {
                if (model[i].IsSelected)
                {
                    await accountManager.AddUserInRole(await accountManager.Get(model[i].UserId), role.Name);
                }
                else
                {
                    await accountManager.RemoveUserFromRole(await accountManager.Get(model[i].UserId), role.Name);
                }
            }
            return(View("Login"));
        }