Right now, I cannot see a way to authenticate with Apple Music on iOS with Expo.

Using only JavaScript, MusicKit can be used with something like this:

```js

const music = window.MusicKit.getInstance();

await music.authorize();

const cloudPlaylists = await music.api.library.playlists();

```

In an iOS native app, one needs to use StoreKit and a bit more:

The way that Expo handles Apple Authentication is really nice. It would be lovely, to have something similar that could be used to allow for access to Apple Music.