title: How do apps access your username / device name without the user explicitly providing it? (Example in description)
body: <p>For example, the VLC app was able to somehow get my username (or device name?) without me ever giving it this info. <a href="https://i.imgur.com/vbKBemY.png" rel="nofollow noreferrer">Here is a screenshot that shows the VLC app greeting me by name in the app switcher</a>. How is this possible if I never gave the app this information? Which API could it be using to obtain this info?</p>