A tiny helper tool that can be used to quickly fetch a Spotify access token from with the command line.
$ npm install -g spotify-auth-cli
To retrieve an access token run the following command:
$ spotify-token
This will open the Spotify Login dialog in your default browser. After confirming, the window will close itself and if successful, you should see an access token in your console.
Several options are available when running the spotify-token command.
The --scope option can be used to specify the scopes you wish to access. For ease of use, this tool will by default request access to ALL available scopes, so use this option to limit that.
Enter the scope as a comma separated list.
$ spotify-token --scope user-read-private,playlist-modify-private
Add the --showDialog flag to prevent the Spotify Login dialog from automatically granting the request after you've already logged in once. Add this flag if you want to switch Spotify user.