How to change the minimum password length when changing from default passwords

[arturo2bodegas]

Hey, guys...I'm trying to change my default passwords for default user and root...passwd isn't happy with my password length, yet it's longer than the default 4-character password...what gives? How can I change this requirement to allow for a shorter new password? Also, a related question...mobian is the default user...can I make a new user and have a multi-user system, or is mobian pretty much the only user apart from root that will work with this setup? on the top bar of phosh there's a grayed-out option to logout...wondering if that can be implemented?
Thanks in advance!