implement-auth-token-flow

You can implement Bearer token authentication by using interceptors to inject tokens, storing access and refresh tokens, proactively refreshing tokens before expiry, and redirecting to login on 401 responses.

The best way to handle automatic token refresh is to proactively refresh tokens before their expiration time and seamlessly retry authenticated requests using a dedicated Dio instance for the refresh process.

You redirect users to login when a token expires by configuring interceptors to detect 401 responses, trigger a token refresh or clear the session, and navigate the user back to the login flow.

Yes, this Bearer token flow uses a DI-driven architecture with a defined wiring order: StorageService, AuthService, Dio, HttpService, DataSources, Repositories, and Cubits to ensure clear separation of concerns.

You need a dedicated Dio instance for token refresh to prevent infinite loops if the refresh endpoint itself returns a 401, ensuring the refresh request bypasses the auth interceptors.

If your Dio 401 interceptor is not working, verify your DI order and ensure your interceptor correctly pauses the request queue, attempts a token refresh, and resumes the request with the new Bearer header.