I am not able to sign in or sign up in GitHub

Question

Every time I am trying to sign up it is showing user name does not exists

Answer 1

Try by changing your password..you would be redirected via mail about confirmation of your details.. where you can find your username.

Answer 2

I just tried signing up and worked fine for me

Answer 3

User does not exist means the user has been already sign so you need to another e-mail id