chpass
Add or change user database information, including login shell and password. See also:
passwd
. More information: https://man.openbsd.org/chpass.
doas chpass
doas chpass -s {{path/to/shell}}
doas chpass -s {{path/to/shell}} {{username}}
passwd
file format:doas chpass -a {{username:encrypted_password:uid:gid:...}}