private void OnLoginAsyncCompleted(string token)
{
_synoSettings.Token = token;
_playbackService.InvalidateCachedTokens();
// if it worked : let's save the credentials.
IsolatedStorageSettings.ApplicationSettings["SynoSettings"] = _synoSettings;
IsolatedStorageSettings.ApplicationSettings.Save();
_pageSwitchingService.NavigateToPreviousPage();
}