reloadUsers method
Implementation
@override
Future<List<String>> reloadUsers(String roomId, String ownerId) async {
  fetchAll = false;
  try {
    CursorResult<String> result =
        await ChatroomUIKitClient.instance.fetchParticipants(
      roomId: roomId,
      pageSize: pageSize,
    );
    if (result.cursor?.isEmpty == true) {
      fetchAll = true;
    }
    cursor = result.cursor ?? '';
    result.data.remove(ownerId);
    result.data.insert(0, ownerId);
    return result.data;
  } catch (e) {
    return [];
  }
}