onSignedOut method

@override void onSignedOut()

退出、会话结束、切换用户：清除内存中的数据、释放列表。

Implementation

@override
void onSignedOut() {
  _closing = true;
  for (final handle in [..._handles.values]) {
    unawaited(handle.teardown(true));
  }
  _closing = false;
  for (final id in [..._leaderBeats.keys]) {
    _stopLeaderBeat(id);
  }
  _handles.clear();
  _banners.clear();
  _savedCurrent = null;
}