Notification to members who expire after X days

The system should send a notification to members who have a membership plan that "Expires After X Days".

We should be able to configure the number of days before the expiration that the notification is sent, and ideally the member should be informed when they try to login to the members portal, or use the mobile app, that their membership is now inactive (this does display when they try to make a booking but not before). The format and content of this notification email should be configurable like the other notifications.