Force account chooser on social sign-in (prompt=select_account)#19
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Set prompt=select_account on the Google and Microsoft providers so the account chooser is always shown during the OAuth handshake. People frequently have several accounts signed in (e.g. a personal Gmail alongside their student one), and the provider silently auto-selecting the wrong one is a common cause of a member being told they aren't one downstream. This only affects the OAuth step. An existing MAC session is reused as before — signed-in users are not re-prompted or logged out; the chooser appears only when someone actually logs in (no session yet). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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What
Adds
prompt: "select_account"to the Google and Microsoft social providers.Why
Several MAC apps (starting with the membership-verification gate) hit a recurring problem: a member is signed into multiple accounts — commonly a personal Gmail alongside their student account — and the provider silently auto-selects the wrong one. Downstream that surfaces as "you're not a member" for someone who genuinely is, because their personal email isn't on the roster.
Forcing the account chooser makes the person consciously pick the right account at login.
Behaviour — important guarantee
This flag only affects the OAuth authorization step, which runs only when there is no active MAC session. So:
.monashcoding.comsession is reused exactly as today — no re-prompt, no logout, nothing extra to click.In other words: SSO still works; users only see the chooser when they're actually logging in.
Scope
This is suite-wide (mac-auth is shared), which is intended — the wrong-account problem isn't specific to one app. Applied to both providers for consistency.
Verification
npm run typecheckpasses (confirms the option is valid for better-auth ^1.6.9).biome checkclean on the changed file.🤖 Generated with Claude Code