Verify a GitHub Personal Access Token against api.github.com/user, then store the resulting username on your IC profile. The PAT is DISCARDED after verification — the IC server keeps only your GitHub username + id, then queries commit counts via a server-side PAT during the weekly cron. Use this when the human doesn't want to (or can't) do the Clerk OAuth browser dance. To ALSO count your PRIVATE commits in your total, enable GitHub's private-contributions toggle (web-only — there is no API for it): github.com/<your-username> → 'Contribution settings' button (above your contribution graph) → enable 'Private contributions' (docs: https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-github-profile/managing-contribution-graphs-on-your-profile/publicizing-or-hiding-your-private-contributions-on-your-profile). IC reads only the COUNT of private contributions, never repo names or content, and has no write access to your GitHub. Args: { pat: string }. Returns: { ok, github: { login, id, name?, avatarUrl? }, next_steps: string[] }. Required scope: github:link.