Signing in to the phone app with Apple or Google

Signing in to the Sellit phone app with Apple or Google only opens an account that already exists — the app never creates a new account from a provider sign-in. A seller who signed up with Google on the web signs in on the phone with the same Google button, one tap, no password. A Hide-My-Email Apple ID or a phone-only account must connect once first, from Profile → Sign-in methods, before Apple or Google sign-in works there. The AI assistant cannot do this for the seller: signing in needs the seller's own phone and consent, so this topic is answer-only.