public ActionResult Customers(Guid? userId)
        {
            var customers = db.Users.Include("User1").Where(u => u.UserRole.Name.Equals("Klant"));

            var model = new AdministratorModel
            {
                Customers = customers,
            };
            ViewBag.OwnerId = userId;
            ViewBag.Action = "Customers";
            ViewBag.Controller = "Administrator";
            return View(model);
        }
        public ActionResult Administrators(Guid? userId)
        {
            if (userId == null)
            {
                if (User != null)
                {
                    userId = User.Id;
                }
            }

            var administrators = db.Users.Include("User1").Where(u => u.UserRole.Name.Equals("Administrator"));

            var model = new AdministratorModel
            {
                Administrators = administrators,
            };
            ViewBag.OwnerId = userId;

            return View(model);
        }
        public ActionResult Departments(Guid? userId)
        {
            var departments = db.Users.Include("User1").Where(u => u.UserRole.Name.Equals("Afdeling") && u.User2.Id.Equals(userId.Value));

            var model = new AdministratorModel
            {
                Departments = departments,
            };
            ViewBag.OwnerId = userId;
            ViewBag.Action = "Customers";
            ViewBag.Controller = "Administrator";
            return View(model);
        }
        public ActionResult OwnCustomers(Guid? userId)
        {
            if (userId == null)
            {
                if (User != null)
                {
                    userId = User.Id;
                }
            }

            var customers =
                db.Users.Where(u => u.UserRole.Name.Equals("Klant") && u.User2.Id.Equals(userId.Value));

            var model = new AdministratorModel
            {
                Customers = customers,
            };
            ViewBag.OwnerId = userId;

            return View("Customers", model);
        }