Beginner here. I'm looking to deploy my app on TestFlight and have a few questions: My app has a messaging feature that connects 2 users in-app to chat: is that possible in TestFlight to send a pairing code to connect 2 devices in the app? Can users pay for to unlock premium features? If build only lasts 90 days, what happens if a user pays to unlock premium for a whole year? If so, what happens to the premium account once we launch in app store? Thanks!