Cancel an in-flight checkout session (e.g. the buyer abandoned the embed). Idempotent — cancelling an already-cancelled session is a no-op; a completed session cannot be cancelled (the API returns 422 already_completed).
already_completed
Optional
Cancel an in-flight checkout session (e.g. the buyer abandoned the embed). Idempotent — cancelling an already-cancelled session is a no-op; a completed session cannot be cancelled (the API returns 422
already_completed).