TL;DR

you want to Sign in with Hack Club, i won't waste your time.

  1. CREATE AN APP. you can do this here after you turn on developer mode.
  2. DO NORMAL OAUTH.
    • send your users to https://hca.dinosaurbbq.org/oauth/authorize with the right params
    • get code at your redirect URI
    • exchange code at POST /oauth/token like any other OAuth provider
    • read more at OAuth Guide if you need help figuring it out
  3. CALL GET /api/v1/me with that bearer token.
    • use the data returned to populate your user profile
    • read more at API if you need help figuring it out