Feature Request: Add support for OAuth

[fullstackpotato]

Very much similar to the reasoning behind #94

As LDAP authentication is getting added, would it be possible to also add in support for OAuth? The reasoning is pretty much identical to the ticket mentioned above, having support for OAuth would allow users to hook up to pre-existing Single Sign On's (e.g. Keycloak).

[ciur]

@0x01BM, thank you for opening this feature request. It makes perfect sense. I didn't know about keycloak project - thanks for mentioning it. I will definitely add OAuth integration.

[Auridh]

@ciur

I saw OAuth2 and OpenID mentioned as a feature for 3.0. So are you able to hook up pre-existing SSOs like Keycloak or Authentik now? I tried looking it up in the documentation, but the section for OAuth2 is still empty.

[ciur]

OAuth2 support is "almost there". By "almost there" I mean that I added the feature, I tested it once with Github and Google as auth servers, and it worked! However, after that I've never used the feature again and also not yet documented it.

I have not yet tried it with Keycloak/Authentik/Authelia etc either. The plan is to have support for OAuth2, OpenID, LDAP anyway.

In short: both feature and documentation is coming soon.