To login to Divjoy pull up the original account email you received after purchase (subject is "Your Divjoy Account") and click the magic login link. You'll then be logged in and continue on to select a template and export your code.
If you can't find this email then reach out and we'll have it resent.
We'll be adding a proper email/password authentication flow soon with all the common stuff you expect, such as account settings, details on your plan, etc.