Requests to Microsoft Store APIs always return empty lists of products / subscriptions
问题 We have free UWP app published to the Microsoft Store with non-consumable upgrade add-ons. As new subscription billing model was introduced to public audience recently, we're planning to utilise it by adding subscription plans in the next release. We also would like to view and manage user-owned add-ons on our backend, and there's relevant documentation to do just that. We followed it closely, but in the end — while trying to get subscriptions for a user, for example — we always get an empty