private void createEventBtn_Click(object sender, RoutedEventArgs e)
        {
            NavigationData navData = new NavigationData();
            navData.loggedInUser = _loggedInUser;

            EditEventScreen editEventScreen = new EditEventScreen();
            editEventScreen.SetupNavigationHandler(this.NavigationService);
            this.NavigationService.Navigate(editEventScreen, navData);
        }
        private void editButton_Click(object sender, RoutedEventArgs e)
        {
            // Get event ID that user has requested to edit.
            Button b = (Button)e.Source;

            // Redirect user to EditEventScreen to edit their event.
            NavigationData navData = new NavigationData();
            navData.loggedInUser = _loggedInUser;
            navData.eventID = (int)b.Tag;

            EditEventScreen editEventScreen = new EditEventScreen();
            editEventScreen.SetupNavigationHandler(this.NavigationService);
            this.NavigationService.Navigate(editEventScreen, navData);
        }