Get Subscription Items Subscription Item Usage Record Summaries

For the specified subscription item, returns a list of summary objects. Each object in the list provides usage information that’s been summarized from multiple usage records and over a subscription billing period (e.g., 15 usage records in the month of September). The list is sorted in reverse-chronological order (newest first). The first list item represents the most current usage period that hasn’t ended yet. Since new usage records can still be added, the returned summary inform...