Before you can start using Groovy, you must first invite him to your server.
- Click this link
- Select your server. If your server is not listed, then you are most likely signed into the wrong account in your browser. Follow this tutorial on logging out and repeat the above steps.
- Press "Authorize"
- Complete the captcha
Now, you are ready to use Groovy. Simply join a voice channel and tell him to play a song!
The same command works with URLs and playlists.