public async Task UsersViewModel_Should_load_0_users_after_ExecuteLoadItemsCommand()
        {
            //Arrage
            var vm = new UsersViewModel();

            //Act
            await vm.ExecuteLoadItemsCommand();

            //Assert
            Assert.AreEqual(0, vm.UserList.Count);
        }
        public async Task UsersViewModel_Should_NOT_load_users_WITHOUT_AddItem()
        {
            //Arrange
            var user = new Fixture().Create <User>();
            var vm   = new UsersViewModel();

            //Act
            await vm.ExecuteLoadItemsCommand();

            //Assert
            Assert.AreEqual(0, vm.UserList.Count);
        }