Add second trusted voice to Google Pixel

Is it possible to add a second "trusted voice" to my Google Pixel so that a second person can say "OK Google" to unlock my phone? I would like to do this so that my phone can act like a substitute for Google Home when I'm at home--in order to enable my partner to unlock through "OK Google", but still restrict it to our two voices only. If it isn't possible to do through a single user, is it possible that setting up a second user will allow this? I'm not familiar with how switching between users works on Android yet.