This example demonstrates how to authenticate with Spotify. In order to run this example yourself, you'll need to:
1. Register an application at: https://developer.spotify.com/my-applications/ - Use "http://localhost:8080/callback" as the redirect URI 2. Set the SPOTIFY_ID environment variable to the client ID you got in step 1. 3. Set the SPOTIFY_SECRET environment variable to the client secret from step 1.