Integrate Registration on live site

We have a membership site set up to simply take recurring subscription payments to use for an outside group so we never set up user registration since there is no protected content on the site. How can we take a site that has many active recurring subscriptions already set up and now change over to including user registration. We want people to be able to renew their subscriptions but in order to it asks them to log in. Since they don't have a username or password or a user account they can not login to renew their subscription. Please advise the bst way to solve this issue. Thanks.

Hi Alex

To renew the subscription, of course they need to login, so in this case, they will need to register for an account on the site using the same email with the email in the subscription record

Then maybe it would be best if you write a script to match the existing subscription records to his user account (base on email).

That would be the idea to handle this case, I think

Tuan