Can't login to the same account

Here's my [hashnode account](https://hashnode.com/@darkmortal)


I signed up using my GitHub account and even created few blogs.
Now when I'm trying to sign in using my GitHub account it's asking me to create a new account.

My emails which were associated with my GitHub account during signing up on hashnode are still the same and have not changed whatsoever.

Any ideas as to what's going on?