I've successfully created a Developer Token and I can retrieve catalog information. What I need now is a way to create the User Token manually from our server. Here's our architecture. Android based smart speaker will play Apple Music from user's library. The server needs to do the searching for catalog and library music and send those results to the Android speaker for streaming. I can't see an easy way to get the User Token from the server without a UI to authenticate. What I'd like to be able to do for testing is use Postman / REST endpoint to pass in my Apple credentials and get a User Token. Is this possible? Longer term, our Smart Speaker admin app can provide a way for users to authenticate in the app and store the user token in their profile. But I need a way to generate one in the meantime.