More web interface users then root

Just a quick question, FreeNAS is administrated by 'root' user.

Can I add more users to manage the FreeNAS appliance with the same (or limited) rights as the 'root' user?

For example 'admin' user with the same rights as 'root' and 'operator' user with less?

I mean to create users that will be able to login into web interface and do the same things as 'root' just with other names like 'admin1' or 'admin2' for accountability.

TIA.