How to get Order ID of Subscription

After a pricing plan has been sold manually through the dashboard, it is visible under Subscriptions.

I am looking for the corresponding Order ID, which I need if I want to cancel this order programmatically through wixPaidPlans . cancelOrder ( orderId )

I know if I had purchased the plan through wixPaidPlans . purchasePlan ( planId ) , the orderID is returned, so I can store this myself.
But if the purchase is done through the dashboard, I’m stuck.

Any tips?