Network status

[ThuTrangT5]

Hi Zoom,
I follow the network document : https://developers.zoom.us/docs/video-sdk/flutter/quality/
then I receive no event links to network  

• When connection lost => nothing
• When connection back => receive event EventType.onUserJoin but it's not network event

 eventListener.addListener(EventType.onUserVideoNetworkStatusChanged,
        (data) async {
      data = data as Map;

      ZoomVideoSdkUser? networkUser =
          ZoomVideoSdkUser.fromJson(jsonDecode(data["user"]));
      ZoomVideoSdkUser? mySelf = await zoom.session.getMySelf();
      if (networkUser.userId != mySelf?.userId) {
        // only track status for local user
        return;
      }

      final networkStatus = data["status"];
      switch (networkStatus) {
        case NetworkStatus.Bad:
          showSnackBar(
            snackBarType: SnackBarType.error,
            title: "Poor network quality".tr,
            message: "Move to an area with better connection".tr,
          );
          break;
        case NetworkStatus.Normal:
          showSnackBar(
            snackBarType: SnackBarType.warning,
            title: "Unstable network quality".tr,
            message: "Improve your network to prevent disruptions".tr,
          );
          break;
        case NetworkStatus.Good:
          showSnackBar(
            snackBarType: SnackBarType.success,
            title: "Optimal network quality".tr,
            message: "Enjoy a seamless consultation experience".tr,
          );
          break;
        case NetworkStatus.None:
          showSnackBar(
            snackBarType: SnackBarType.success,
            title: "No network".tr,
            message: "We have to end the call due to no network connection. Please try again later".tr,
          );
          break;
      }

    });

 Could you give me some advice for this?