Optionalbilling_Optionalend_Behavior of the subscription schedule and underlying subscription when it ends. Possible values are release or cancel with the default being release. release will end the subscription schedule and keep the underlying subscription running. cancel will end the subscription schedule and cancel the underlying subscription.
OptionalphasesList representing phases of the subscription schedule. Each phase can be customized to have different durations, plans, and coupons. If there are multiple phases, the end_date of one phase will always equal the start_date of the next phase.
Optionalproration_In cases where the schedule_details params update the currently active phase, specifies if and how to prorate at the time of the request.
Controls how prorations and invoices for subscriptions are calculated and orchestrated.