Create an update to apply on an existing subscription.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Add a new product to bill as part of the subscription.
immediately, scheduled immediately, next_invoice pro_rata, pay_in_full, do_not_charge add_product The date when the update should be applied. Required when application_schedule is 'scheduled'.
"2024-12-20T16:04:11Z"
Subscription update created