Different firebase google_services.json file on same device


I am building an app that uses push plugin to receive notifications.
I downloaded a google_services.json with a unique project ID and got a unique registration ID on push.on('notification') event.

I am sending push notifications on this id, and I am receiving it as well.

And this is for a user named A.

But my question is,

If there is a user B, with his own very google_services.json and project ID, will and logged in to the app from the same device, will he receive notifications from the server?

Or most dangerously, will user A gets the notification?