You can create an account by going to www.gencon.com and clicking the “Sign In” link on the top right. Below the Sign In section, it says “Don’t have an account yet? Create one now!” Click that header and fill out the form.
Once created, an email will be sent to you with a link. Click that link to activate your account, and you should be all set! (It may take up to 24 hours for the activation email to reach you.)