Musickit js isn't playing. Is it my developer token?

My basic script will not work. When I click the button it should play as all documentation tells me


<html>

<head>

<meta name="apple-music-app-name" content="Gramophone Music">

<meta name="apple-music-app-build" content="1978.4.1">

<meta name="apple-music-developer-token" content="<DEVELOPER TOKEN>">


<script src="https://js-cdn.music.apple.com/musickit/v1/musickit.js"></script>

</head>

<body>

<button data-apple-music-set-queue="https://itunes.apple.com/gb/playlist/dance-nation/pl.8cf5ae2b303642b1a43c8beda7c26d4f">Dance</button>

</body>

</html>



Instead I get the errors in the console:


GET https://api.music.apple.com/v1/catalog/gb/playlists?ids=pl.8cf5ae2b303642b1a43c8beda7c26d4f 401

Uncaught (in promise) UNAUTHORIZED_ERROR: 401

at Function.MKError.responseError (https://js-cdn.music.apple.com/musickit/v1/musickit.js:1:25592)

at API.<anonymous> (https://js-cdn.music.apple.com/musickit/v1/musickit.js:1:96686)

at https://js-cdn.music.apple.com/musickit/v1/musickit.js:1:14467

at Object.throw (https://js-cdn.music.apple.com/musickit/v1/musickit.js:1:14572)

at rejected (https://js-cdn.music.apple.com/musickit/v1/musickit.js:1:13351)


Is it because of my Developer Token. It seems to be different every time the script is run


const fs = require("fs");

const jwt = require("jsonwebtoken");


const privateKey = fs.readFileSync("Authkey_<key id>.p8").toString();

const teamId = "<team id>";

const keyId = "<key id>";


const jwtToken = jwt.sign({}, privateKey, {

algorithm: "ES256",

expiresIn: "180d",

issuer: teamId,

header: {

alg: "ES256",

kid: keyId,

iss: teamId

}

});