Steam sign-in (docs/website/STEAM_SIGNIN.md) lets a person link more than one
Steam account. Unlink went by provider, so it would have removed all of them;
it now sends the identity's id (DELETE …/identities/:provider?id=). A Steam row
reads "Steam: <persona name>" with its SteamID64 beneath, since Steam sends no
email. The sign-in sheet already lists providers from /auth/providers, so Steam
appears there with no change.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY
