Listen to auth events

1final subscription = Amplify.Hub.listen(HubChannel.Auth, (AuthHubEvent event) {
2  switch (event.type) {
3    case AuthHubEventType.signedIn:
4      safePrint('User is signed in.');
5      break;
6    case AuthHubEventType.signedOut:
7      safePrint('User is signed out.');
8      break;
9    case AuthHubEventType.sessionExpired:
10      safePrint('The session has expired.');
11      break;
12    case AuthHubEventType.userDeleted:
13      safePrint('The user has been deleted.');
14      break;
15  }
16});