How to configure postpaid products
Some of our products require prepayment and are automatically activated after the user pays;
Another part of the product is automatically activated after the user places an order (not yet paid), and the customer will be billed next month and a certain bill buffer period will be provided to the user;
E.g:
Create order time: 2022.07.05;
Invoice creation time: 2022.08.04
Invoice service time: 2022.07.05-2022.08.04;
Latest invoice payment time: 2022.08.30;
How should such a requirement be implemented in whmcs?