Is there any way to control with Google Home?

I built the raspberry pie version with Volumio on it and everything is working good. I want to put it in my backyard where I also have a Google Home. But I can’t figure out any way to control it. I have the Spotify connect working so I can cast to it from my phone but anytime after that that I tell Google Home to play some music It disconnects from volumio and reconnects to my phone.

I just want to get higher quality music in the backyard that can be controlled with voice so anybody can pick songs.