Up to six accounts can be added to Google Home, and if you want to add multiple accounts from the same device, open the Google Home app and tap the hamburger button in the top left corner to reveal the left menu. Click on one of the additional accounts or tap on the drop-down menu...
Manage multiple Google Home accounts At this time, Google Home devices support up to six accounts, so everyone from your spouse to your children to frequent houseguests can create accounts. You can view all active accounts on a Google Home device at any time by tapping your connected device, ...