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

SuperTokens.com

Does GetProfileInfo return the account from the provider? Like am I able to point GetProfileInfo at an api endpoint to retrieve things like the provider ID, avatar, etc.

You should see the return type of what that function should return

It returns the user id, email and if that email is verified or not

If I want to fetch more, should I just be doing that API query in the signinup post response with the access token?