Login with Steam / OpenID 2.0

**Is your feature request related to a problem? Please describe.**
I see there was a talk about "Login with Steam" feature in the Discord server.
Steam is using OpenID 2.0 but not OIDC so it's not supported currently. That spec is a bit outdated but Steam is a good social login choice

**Describe the solution you'd like**
Add Steam as a social login option

**Describe alternatives you've considered**
No

**Additional context**
https://partner.steamgames.com/doc/features/auth
https://steamcommunity.com/dev/apikey