dispose method
Disposes the account
Disables any ongoing autoRefresh and sets it to false. Also disposes of the internally used stream controller for idTokenStream.
Important: Even if you do not use any of the two properties mentioned above, you still have to always dispose of an account.
Implementation
Future<void> dispose() async {
autoRefresh = false;
if (!_refreshController.isClosed) {
await _refreshController.close();
}
}