public ActionResult Create(Memberships memberships)
        {
            if (ModelState.IsValid)
            {
                memberships.UserId = Guid.NewGuid();
                db.Memberships.Add(memberships);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(memberships);
        }
 public ActionResult Edit(Memberships memberships)
 {
     if (ModelState.IsValid)
     {
         db.Entry(memberships).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(memberships);
 }