public async Task <ActionResult> Details(IdentityRoleVM rolePar)
        {
            var role = await _repo.FindById(rolePar.Id);

            if (role == null)
            {
                return(NotFound());
            }

            var isSuccess = await _repo.AddUserByRole(role.Id, rolePar.NewUserName);

            var users = await _repo.FindAllUsersByRole(rolePar.Id);

            if (users.Count > 0)
            {
                rolePar.Users = users.ToList();
            }
            else
            {
                rolePar.Users = new List <ApplicationUser>();
            }

            if (!isSuccess)
            {
                ModelState.AddModelError(string.Empty, "Could not add " + rolePar.NewUserName);
            }
            return(View(rolePar));
        }