how can in the smb.conf a shared directory be made available with samba not
only for one, but for several valid users?

In my smb.conf for a certain share there is the entry
valid users = user1

The same share shall be made available for user2, too; how must be the entry
in the smb.conf?
Where, i. e. on which link, can I find a good survey with detailed
explanation and perhaps also some exmples about the - at least most
current - parameters used for smb.conf?

Thanks for all good hints.

Thomas Wiedmann