public async Task <IActionResult> UpdateUser(UserViewModel model)
{
ViewData["Title"] = "Edit a User";
var user = await UserManagerAgent.FindByNameAsync(model?.UserName).ConfigureAwait(false);
user.FirstName = model.FirstName;
user.LastName = model.LastName;
user.Email = model.Email;
await UserManagerAgent.UpdateAsync(user).ConfigureAwait(false);
model = _mapper.Map <UserViewModel>(user);
model.MemberRoles.AddRange(await UserManagerAgent.GetRolesAsync(user).ConfigureAwait(false));
model.AllRoles.AddRange(GetAllRolesAsSelectList());
return(View("EditUser", model));
}