Using a Spotify premium account and a playlist from that same account is a requirement of this project, however it is possible for a free account to create an application on the developer dashboard and get the required credentials.

Setting up a jukebox like that can lead to a situation where the jukebox is created, and someone paying for a song there will not get her request attended due to a spotify 403 error. Internally the browser receives this Failed to get auth response from the extension's API, however the UI don't display any message for the user that paid the invoice, from an user perspective it just freezes.