ArcGISPortalViewer.ViewModel.SignInViewModel.SignOutAsync C# (CSharp) Method

        public async Task SignOutAsync()
        {
            PortalService.CurrentPortalService.SignOut();

            try
            {
                ClearAllCredentials();
                // set IsCredentialsPersisted to false
                IsCredentialsPersisted = false;
            }
            catch (Exception ex)
            {
                var _ = App.ShowExceptionDialog(ex);
            }

            // if anonymous access is enabled go back to the main page otherwise go back to the signin page
            bool isAnonymousAccess = await GetAnonymousAccessStatusAsync();
            if (isAnonymousAccess)
            {
                (new NavigationService()).Navigate(App.MainPageName);
                await SignInAnonymouslyAsync();
            }
            else
                (new NavigationService()).Navigate(App.BlankPageName);
        }