This unlocks your synced bills on this device. Enter the passcode you set up. It's stored only on this device — not in the app file.
Don't have it? You can also just use this device on its own without syncing — skip for now.
Paste the two values from your Supabase project, then use the same Sync ID on every device. Setup steps are in the chat.
A safety net you can use anytime — copy a code from one device and paste it into another.