Hi @gentlebash. Thanks for being part of GoDaddy Community!
If you've purchased a cPanel plan, you will need to first set it up within your GoDaddy account. While doing so, you'll choose your primary login information, which you can use to log in via FTP or from yourdomain.com/cpanel. If you've already set up your account but don't remember the details, you can use the instructions here to help reset your password. Your username should appear from within your cPanel dashboard, which you can also launch from within your GoDaddy account.
JesseW - GoDaddy | Community Manager | 24/7 support available at x.co/247support | Remember to choose a solution and give kudos.