Has anyone found a solution to this? I also see this error (not authorized to access com.apple.accountiTunesStore) when attempting to monitor changes to SystemMusicPlayer.shared.state as well as when I attempt to fetch the user's playlists from their library using MusicLibraryRequest(). I have also checked if I missed any settings/configurations with my app's bundle certifications, but I confirmed that MusicKit is checked off under App Services and I have added the necessary Privacy - Media Library Usage to Info.plist

@Serjio2888 Any update on this? I am in a similar situation where I need to store a MusicUserToken for long term use