public IActionResult Group()
{
HttpContext.Session.SetString("first_name", "josh");
HttpContext.Session.SetInt32("user_id", 15);
var first_name = HttpContext.Session.GetString("first_name");
ViewBag.first_name = first_name;
ViewBag.user_id = HttpContext.Session.GetInt32("user_id");
ViewBag.all_groups = groupFactory.FindAll();
return(View());
}