Unable to login to my paid account using GitHub

Description of the problem (please keep it simple and short):
Logging in with my github account is not working. I get an error asking me to log in with an email account I didn’t know I had. I had to create another account to post this.

Explain what you were trying to do:
Log in to my account with github account “lukaswelinder”.

What areas or features are involved?

Repl Cover Page Link/Screenshots/Etc: (to protect you and your code, never share your Repl join link outside of PMs)