private void InitCallback()
    {
        if (FB.IsInitialized)
        {
            FB.ActivateApp();
            CheckGameServer();
        }
        else
        {
            Debug.Log("Failed to Initialize the Facebook SDK");
        }
    }

    private void OnHideUnity(bool isGameShown)
    {
        Time.timeScale = isGameShown ? 1 : 0;
    }

    private void Awake()
    {
        OneSignal.StartInit(OneSignalKey)
            .HandleNotificationOpened(HandleNotificationOpened)
            .EndInit();

        OneSignal.inFocusDisplayType = OneSignal.OSInFocusDisplayOption.Notification;

        if (!FB.IsInitialized)
        {
            FB.Init(InitCallback, OnHideUnity);
        }
        else
        {
            FB.ActivateApp();
            CheckGameServer();
        }
    }

    private void DeepLinkCallback(IAppLinkResult appLinkResult)
    {
        Debug.Log($"DeepLinkCallback {appLinkResult}");
        RunGameCore(appLinkResult.Url);
    }

    private void CheckGameServer()
    {
        FB.Mobile.FetchDeferredAppLinkData(DeepLinkCallback);
    }