Twitch (and other) OAuth providers

[londospark]

A general question: with Azure AD and Google Auth providers being directly integrated into Saturn.Extensions.Authorization would adding more (e.g. Twitch) be welcomed or would it be preferable to use the standard use_oauth and submit examples for other providers?

[Krzysztof-Cieslak]

I'd be really happy to add some additional popular providers to the authorization package 👍

[cartermp]

@garethhubball contributions welcome The file that handles this has a pretty straightforward pattern. I'll gladly look over any PR you might have.