I'm a new programmer and I'm trying to work with the Apple Music API as a way to teach myself. So this is probably a dumb question, but I'm using the docs to figure out how to make a request, and I think I have the token all set with the key ID and UNIX time and all that. But I get a 401 Unauthorized back when I send a GET request with it, and I'm having trouble understanding what the docs say about authorization. It says to pass Authorization: Bearer in the header. I'm trying to do that in Insomnia but it must be over my head. I'm guessing there's something obvious that I'm doing wrong, but I'm not sure what. Hoping someone here will take one look at it and be able to tell me. I tried it a few different ways but this is the gist.

I was thinking about paying to join the Apple Developer program for access to the Apple Music API, and making an app just for practice in improving my skills. I was looking at the sample response data in the documentation online, and noticed there's some stuff missing that I would want to use. Mainly what songs are in a playlist (it looks like you get that info for a catalog playlist but not a library playlist, which seems backwards but maybe I'm confused about what those mean), and information about particular songs in a user's library like number of plays, date last played, etc. Basically I thought you'd get access to anything you can see in the Apple Music Player on the desktop version. It seems like that's obviously not true but I was surprised, so I thought I'd ask to see if anyone who has used the API can tell me for sure. Probably don't want to pay if you don't get access to all the data I was thinking about.