public IActionResult Add(string name, string description)
{
var user_id = HttpContext.Session.GetInt32("user_id");
groupFactory.Add(name, description, (int)user_id);
var found_name = groupFactory.FindByName(name);
var group_id = found_name.id;
groupFactory.AddUserGroup((int)user_id, (int)group_id);
return(RedirectToAction("Group"));
}