Triggered when an order is canceled.
This webhook is triggered either immediately or at the end of the current payment cycle, as follows:
effectiveAt is set to IMMEDIATELY, the webhook is triggered immediately when canceled.effectiveAt is set to NEXT_PAYMENT_DATE, the webhook is triggered at the end of the current payment cycle. In this case, the Order Auto Renew Canceled Webhook is triggered immediately.handler(event: OrderCanceledEnvelope): void | Promise<void>