Are you looking for a solution with full browsing/playback/etc. capabilities for the Vero or just a way to use the Vero audio out for Spotify?
If you’re also fine using Spotify Connect with then full functionality of Spotify through its own app, I’d like to point you here:
It seems that it’s not fully working on Vero yet from the comments given in the thread, but you could go over there and try helping to get it to work on Vero - should be possible with some more to help… On RPi it’s already working like a charm!