Help:Can I use my IEEE Account to Sign In
This is a help page in the Account section.
No. The GHN uses its own system for accounts, which is different than the IEEE Account system. You can set your username to be the same as the first part of your IEEE Account - for example if your IEEE Account was firstname.lastname@example.org, you could create an account on the GHN called user123 and use the same password.
If you do not currently have a GHN account, you can fill out the account creation form to request one.