Flutter authentication

Implement TokenProvider

import 'package:v_chat_flutter/v_chat_flutter.dart';

final class BackendTokenProvider implements TokenProvider {
  const BackendTokenProvider();

  @override
  Future<AuthToken> getToken({required bool forceRefresh}) {
    return loadCurrentUserVChatToken(forceRefresh: forceRefresh);
  }
}

Backend token endpoint

1. Authenticate the product user with your normal backend session.
2. Derive the V Chat user ID server-side from that identity.
3. Use AppServerClient and the protected application credential to issue a bounded token.
4. Return the opaque token and optional ISO expiry over HTTPS.
5. Do not return refresh tokens or the application credential.

Logout and account switching

• Revoke the current device registration before logout when push is attached.
• Disconnect realtime and stop all listeners.
• Dispose the client and its owned offline store.
• Create a fresh SDK and scoped database for the next user; never reuse state across logical sessions.