feat(user-management): use the User $resource to populate users for the admin page

Changes:
- use User.query() in admin.controller instead of $http

Author: kingcody

app/templates/client/app/admin(auth)/admin.controller(coffee).coffee

@@ -3,9 +3,8 @@
 angular.module '<%= scriptAppName %>'
 .controller 'AdminCtrl', ($scope, $http, Auth, User) ->
 
-  $http.get '/api/users'
-  .success (users) ->
-    $scope.users = users
+  # Use the User $resource to fetch all users
+  $scope.users = User.query()
 
   $scope.delete = (user) ->
     User.remove id: user._id

app/templates/client/app/admin(auth)/admin.controller(js).js

@@ -3,9 +3,8 @@
 angular.module('<%= scriptAppName %>')
   .controller('AdminCtrl', function ($scope, $http, Auth, User) {
 
-    $http.get('/api/users').success(function(users) {
-      $scope.users = users;
-    });
+    // Use the User $resource to fetch all users
+    $scope.users = User.query();
 
     $scope.delete = function(user) {
       User.remove({ id: user._id });