I see that there is a Github Sponsors extension for Flarum but it hasn't been active since 1.0 and there is no documentation about how it works.
Here's the idea:
1) My Flarum forum only accepts Github OAuth2 usernames and logins.
2) I want to restrict access to my Flarum forum based on whether the user has sponsored my project and made a donation.
How would I accomplish this?