MainPage.xaml.cs_ContinueWebAuthentication

/// <summary>
/// Continues the app after retrieving the authorization code.
/// 
/// First it stores the authorization code result in the data store.
/// Then it calls the view model get blogs method, in order to retrieve all blogs.
/// The view model is responsible to check for if the authorization code exists in
/// the data store, and then, continue with the regular flow.
/// After retrieving all blogs, this method deletes the authorization code so it
/// won't be used in a next run.
/// </summary>
public async void ContinueWebAuthentication(
  WebAuthenticationBrokerContinuationEventArgs args)
{
    await PasswordVaultDataStore.Default.StoreAsync<WebAuthResult>(
        WebAuthResult.Name, new WebAuthResult(args.WebAuthenticationResult));
    await ((BlogsViewModel)this.DataContext).GetBlogsAsync();
    await PasswordVaultDataStore.Default.DeleteAsync<WebAuthResult>(WebAuthResult.Name);
}