Automatically email customers without cards on their account during Auto Re-enrolment

At the moment, if a customer doesn’t have a card on their Book That In account, the business owner needs to send out an email to that customer when they are using Auto Re-enrolment to either ask them to book on, or add a card to their account.

This feature request would be to trigger an email to these customers at the same time as the regular auto re-enrolment emails are sent out, with a link that allows them to book onto the class. This would also add a card to their account, so they can be auto re-enrolled in future.