SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

When override `signInUpPOST` on backend for github oauth, is it possible to get the user info (like github avatar url) from response of `originalImplementation.signInUpPOST`?

You can get the access token from calling the original implementation and the query GitHub yourself after that

But I guess the api already did the api request (to get email) right?

in the version release after 1 month (approx), we will expose that info too

Great, I will request myself by now and waiting for the next release.