console.cloud.google.com
Create OAuth client (Web application)
Input
name requiredDisplay name for the OAuth client (console-only label)
account requiredGoogle account the client is created under. Must be the browser session's DEFAULT (authuser=0) account — the script verifies this and fails loud on a mismatch; it does not switch accounts.
projectId requiredGCP project id that owns the OAuth consent screen, e.g. gen-lang-client-0289504322
redirectUris requiredAuthorised redirect URIs, e.g. https://your-app.vercel.app/auth/callback/google
Output
name requiredclientId requiredclientSecret requiredShown only at creation; store it now
