public void CheckForUserCreated()
        {
            IUserService usersService = new UserService(usersRepoMock.Object);
            IKartService kartsService = new KartService(kartsMock.Object, usersService, productsServiceMock.Object);

            Kart kart = new Kart();

            kartsService.Create(kart);
            Assert.True(userList.Count == 1);
            Assert.True(kart.User == userList.LastOrDefault());
        }