updated list_users functions to reflect new instance naming standard

.gitignore

@@ -1 +1 @@
-/data
+*/data

modpol/users/users.lua

@@ -13,10 +13,10 @@
 modpol.list_users = function(org)
    local users = {}
    if (org == nil) then -- no specified org; all players
-      if modpol.orgs["instance"]
-         and modpol.orgs["instance"]["members"] then
+      if modpol.instance
+         and modpol.instance.members then
          -- if instance exists and has membership
-         users = modpol.orgs["instance"]["members"]
+         users = modpol.instance.members
       else
          users = {}
       end