ImportSourceCoreApi: allow to import user objects

fixes #11334

library/Director/Core/CoreApi.php

@@ -314,6 +314,16 @@ constants
         ));
     }
 
+    public function getUserObjects()
+    {
+        return $this->getDirectorObjects('User', 'User', 'users', array(
+            'display_name' => 'display_name',
+            'email'        => 'email',
+            'groups'       => 'groups',
+            'vars'         => 'vars',
+        ));
+    }
+
     protected function buildEndpointZoneMap()
     {
         $zones = $this->getObjects('zone', 'zones', $attrs = array('endpoints'), 'director');

library/Director/Import/ImportSourceCoreApi.php

@@ -50,15 +50,24 @@ class ImportSourceCoreApi extends ImportSourceHook
         $form->addElement('select', 'object_type', array(
             'label'    => 'Object type',
             'required' => true,
-            'multiOptions' => $form->optionalEnum(array(
-                'CheckCommand'  => 'Commands',
-                'Endpoint'      => 'Endpoints',
-                'Host'          => 'Host',
-                'Zone'          => 'Zones',
-            ))
+            'multiOptions' => $form->optionalEnum(self::enumObjectTypes($form))
         ));
     }
 
+    protected static function enumObjectTypes($form)
+    {
+        $types = array(
+            'CheckCommand'  => $form->translate('Commands'),
+            'Endpoint'      => $form->translate('Endpoints'),
+            'Host'          => $form->translate('Hosts'),
+            'User'          => $form->translate('Users'),
+            'Zone'          => $form->translate('Zones'),
+        );
+
+        asort($types);
+        return $types;
+    }
+
     protected function api()
     {
         if ($this->api === null) {