Cancels the order. Its status becomes cancelled, and no more payments are collected.

• You can cancel an order in any status except complete and cancelled. For a live order that isn't a subscription, complete it instead.
• If the order is already complete or cancelled, you get 200 with the order unchanged. It's safe to retry a cancel.
• Upcoming scheduled payments are cancelled too. Nothing is charged or refunded. Payments already taken stay as they are.
• On a paused order, the scheduled payments are cancelled too.
• You can't undo a cancellation.

Send no request body.

Cancel or complete? Cancel an order that never took a payment (draft, pending or rejected), or a subscription you want to end. Complete any other live order. Both stop all future payments.