public async Task NavigatesToTheLoginPageIfUserHasCompletedOnboarding()
            {
                OnboardingStorage.CompletedOnboarding().Returns(true);

                await ViewModel.Initialize();

                await NavigationService.Received().Navigate <LoginViewModel>();
            }
            public void InitializesCurrentPageToTrackPageIfUserHasCompletedOnboarding()
            {
                OnboardingStorage.CompletedOnboarding().Returns(true);

                ViewModel.Prepare();

                ViewModel.CurrentPage.Should().Be(OnboardingViewModel.LoginPage);
            }