Answer the following frequently asked questions:
- Can't login nor save preferences (e.g #2962)
- Sync user data between multiple instances (e.g #2515)
- Captions/Subtitles not showing up (e.g #2565)
- DB::PoolRetryAttemptsExceeded (e.g #1582)
- Where are the other quality options? (e.g #2521)