public ActionResult AddCredit(CreditToUser new_relation)
        {
            var user = dbContext.Users.Find(new_relation.userId);

            user.Balance = user.Balance + new_relation.addedCredit;

            dbContext.SaveChanges();

            return(RedirectToAction("Index", "Manage"));
        }
        public ActionResult AddCredit()
        {
            var          user         = UserManager.FindById(User.Identity.GetUserId());
            CreditToUser new_relation = new CreditToUser();

            new_relation.userBalance = user.Balance;
            new_relation.userId      = user.Id;
            new_relation.userName    = user.Name + " " + user.Surname;

            return(View(new_relation));
        }