Spotify Quick Setup Guide?

> I've never found a use for spotify but my son has a (free) account and
> would like to play his music through a squeezebox boom which I've put in
> his room. Is there a quick setup guide anywhere? I can see an 'official'
> spotify plugin but can't see any options to configure it, and a 'spotty'
> plugin that I'm not sure is also needed?

The "official" implementation has been shut down by Spotify a few years
ago. Spotty is the way to go nowadays. But it won't work with a free
account.

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Michael