/// <summary>
/// Checks if credentials are available and not expired,
/// which are then used to restore the sign in status.
/// Registers the user for Push notifications.
/// The user is not actively taken to a login page.
/// </summary>
public async Task RestoreSignInStatusAsync()
{
var user = await _authenticationHandler.RestoreSignInStatus();
if (user != null)
{
AppEnvironment.Instance.CurrentUser = user;
// To enable existing users to register for Push notifications without having to
// log out and log in again.
RegisterForNotifications();
}
}
