Dealing with multiple Sonos, Google Nest and Spotify

When you're house is setup as follow:

- multiple rooms

- per room a Sonos speaker

- per room a Google Nest

- and each Nest is connected to an accompanied Sonos speaker

- per sleeping room, thus a person, a Spotify account 

Both Google Nest and Sonos have a hard time dealing correctly with Spotify. 

The Sonos app can only deal with only one Spotify account. But this will result into only playing one session at a time. 

You can connect each Nest to a personal Spotify account, that's fine. But when the Nest is connecting to a Sonos speaker, Nest will complain that the Nest is connected to another account than the Sonos App.

Preferred solutions:

1. In the Sonos App, allow a speaker to connect to a "general" Spotify account and a personal Spotify account. 

2. Allow the Nest to play as a session as "Started from Spotify" 

3. Allow the Nest to play a session as "Started from Google Nest"

Or (better yet) ... Did anyone succeed to manage a similar problem? If so, please help.