Thank you for the reply. However, this code appears to show how to use the username as the email address, but not how to prevent the issue of same user registering under a new email address.
What my issue is they will register with a DIFFERENT email address than the paypal email address that they paid with.
for example: [email protected] then they register with [email protected] then next 30 day trial [email protected]
P.S. Yes I have the pro version.