Didnāt see the original post and thread (maybe because I got there via search?), so all I saw was elquintoās last message.
Anyways, reading through gave me the idea to try resetting my password w/ the email I use on Github, and that seems to have worked.
Or maybe I just made an account with that email at one point and forgot about it. Bad account hygiene here.
Anyways, maybe thatās a tip for someone in the future with the problem, but Github/Google OAuth integration definitely seems broken.