[Samba] Password-less share, for certain users.

[JDE]

Here's what I got. I want to allow a 'password-less' log-in that will
allow only user1 and user2 to access share_zero, can this be done? I
know that I can make it public, but that's not really an option as I
need to restrict access to just a hand full of users. Can this be
done? I've searched everywhere and all I can find is setting share to
public, or something similar.

[share_zero]
    path = /path/to/dir
    writeable = yes
    browseable = yes
    valid users = user1 user2
    guest ok = yes
    create mask = 0666
    directory mask = 0777