added sample app for client-server authentication

server/controllers/user.js

@@ -0,0 +1,17 @@
+var _ =           require('underscore')
+    , User =      require('../models/User.js')
+    , userRoles = require('../../client/js/routingConfig').userRoles;
+
+module.exports = {
+    index: function(req, res) {
+        var users = User.findAll();
+        _.each(users, function(user) {
+            delete user.password;
+            delete user.twitter;
+            delete user.facebook;
+            delete user.google;
+            delete user.linkedin;
+        });
+        res.json(users);
+    }
+};