This is a list of users that should be allowed to login to this service. Names starting with
'@', '+' and '&' are interpreted using the same rules as described in the
invalid users parameter.
If this is empty (the default) then any user can login. If a username is in both this list
and the invalid users list then access is denied
for that user.
The current servicename is substituted for %S.
This is useful in the [homes] section.
invalid users
No valid users list (anyone can login)
greg, @pcusers