How do I remove guest user from Mac Book pro

Are you trying to delete the only Guest account from your computer?

If you have just one Guest account showing in System Preferences > Accounts, it can't be deleted, but it can easily be disabled. If the padlock at the bottom of the window is closed, click it and enter your admin password to make changes, then uncheck "Allow guests to log in to this computer" and "Allow guests to connect to shared folders." The Guest account is now disabled and can't be used. Click the padlock again to prevent further changes.

All I want to do is remove the Guest user from showing at the login screen. This account is disabled and the iCloud account is unchecked for track my Mac. Even worse, the guest account is asking for a login ID and password now