payment_link, then disable it when you are done.
Create a collection
POST /collections returns a reusable checkout URL. Omit amount (or set null) to let the customer enter it. Amounts are minor units.
expires_at to stop new checkouts after a time.
Email the link
Payments on a collection
Disable
Stops new payments. Completed payments stay.collection.completed and collection.canceled. See Webhooks.

