While login happens with a Google account, guest logins are possible.

The advice given typically is to have a separate account for the device 'ownership', that way, even if your main account gets blocked you still have access to it.

See for instance this blog article which talks about that: https://blog.lessonslearned.org/building-a-more-secure-devel...

'factory resetting' a device is easy too so that you can get rid of the device in a nice pristine state...