Fix login persistence without putting server secrets in a mobile app

Users must sign in after every restart, so the developer considers embedding a permanent credential in the app. That would create a shared secret available to anyone who extracts the application.

Why this happens

Session persistence requires a user-specific lifecycle. App binaries and public environment variables are not secure storage for backend signing keys or service credentials.

Step-by-step solution

1. Define which user session token may be stored on the device and how expiration, refresh and logout work on the server.

2. Use platform-backed secure storage for appropriate sensitive session material. Handle unavailable or invalidated stored values as a normal signed-out state.

3. On startup, validate the session with the backend before granting protected UI access. On logout, clear local session material and invalidate the server session when supported.

Worked example

Store a user session credential, not ADMIN_PASSWORD or a Cloudinary signing secret. The server must still check the user’s role on every protected operation.

Verify the fix

Test restart, expiry, logout and a revoked session. A stale token should lead to sign-in rather than repeated failing requests or accidental privileged access.

Prevent a repeat

Keep secrets out of EXPO_PUBLIC variables and logs. Document the secure-storage limitations that apply to reinstall, backups and biometric changes.

Reference

Official documentation or standards guidance

An original Gistmax troubleshooting guide. Scenarios and sample values are illustrative; configuration depends on your software version and environment. Cover diagram: Gistmax Tutorials.