[HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Logging(Models.User vm)
        {
            try
            {
                using (var db = new LibraryContext())
                {
                    var hashedPassword = Helpers.HasherHelper.sha256Hex(vm.Password);
                    var user = db.Users.FirstOrDefault(x => x.Album== vm.Album);
                    if (user != null )
                    {
                        if (user.HashedPassword == hashedPassword)
                        {
                            Session["Album"] = vm.Album;
                            Session["Role"] = db.Roles.FirstOrDefault(x => x.RoleID == db.Users.FirstOrDefault(y => y.Album == vm.Album).RoleID).RoleName;
                            Session["userID"] = db.Users.FirstOrDefault(x => x.Album == vm.Album).UserID;
                            return RedirectToAction("Index", "Home");
                        }
                        else
                        {
                            if (user.Password == vm.Password)
                            {
                                user.HashedPassword = hashedPassword;
                                db.SaveChanges();
                                Session["Album"] = vm.Album;
                                return RedirectToAction("Index", "Home");
                            }
                           TempData["Message"] = "Błędne dane logowania";
                           return RedirectToAction("Logging", "Users");
                        }
                    }
                    else if (user == null)
                    {
                        TempData["Message"] = "Błędne dane logowania";
                        return RedirectToAction("Logging", "Users");
                    }
                    else
                        return RedirectToAction("Error", "Error");
                }
            }
            catch (Exception e)
            {
                return RedirectToAction("Error", "Error");
            }
        }