// This example is via `service-configuration`
ServiceConfiguration.configurations.update(
  { "service": "spotify" },
  {
    $set: {
      "clientId": "<your clientId>",
      "secret": "<your secret>"
    }
  },
  { upsert: true }
);

var spotifyApi = new SpotifyWebApi();

// credentials are optional
var spotifyApi = new SpotifyWebApi({
  clientId : 'fcecfc72172e4cd267473117a17cbd4d',
  clientSecret : 'a6338157c9bb5ac9c71924cb2940e1a7',
  redirectUri : 'http://www.example.com/callback'
});

// Get Elvis' albums `synchronously` on the server.
var response = spotifyApi.getArtistAlbums('43ZHCT0cAZBISjO8DG9PnE');
console.log(response);

// Or use a classic callback approach. 
// Note that the OPTIONS parameter is always required for this format!
spotifyApi.getArtistAlbums('43ZHCT0cAZBISjO8DG9PnE', {}, function(err, result) {
  console.log(result);
});

// Just refresh the token and manually deal with the response.
// response contains the new access_token and the new expire_in
var response = spotifyApi.refreshAccessToken();

// Refresh the access token, update the current instance with the token, 
// and update the user's credentials as well.
spotifyApi.refreshAndUpdateAccessToken(); // All done here.