/**
  * AJAX Handler für Admin Aufrufe.
  */
 public function ajax_handler()
 {
     $run = isset($_REQUEST['run']) ? $_REQUEST['run'] : null;
     switch ($run) {
         /**
          * AJAX Call vom Admin zum prüfen des API-TOKEN
          */
         case 'checkAPI_Token':
             $api_token = $_REQUEST['API_TOKEN'];
             $YAPI = new YumpuAPI($api_token);
             try {
                 $YAPI->check_api_key();
                 /**
                  * Wir speichern den API Token
                  */
                 update_option(self::YUMPU_WP_SETTINGS_KEY, $api_token);
                 /**
                  * Und setzen den API-Token direkt.
                  */
                 WP_Yumpu::$API_TOKEN = $api_token;
                 echo json_encode(array('result' => true));
             } catch (YumpuAPI_Exception $e) {
                 echo json_encode(array('result' => false, 'error' => $YAPI->get_errors()));
             }
             break;
             /**
              * AJAX Call vom Admin zum erstellen eines Accounts
              */
         /**
          * AJAX Call vom Admin zum erstellen eines Accounts
          */
         case 'createAccount':
             $acc_email = $_REQUEST['email'];
             $acc_password = $_REQUEST['password'];
             $acc_username = $_REQUEST['username'];
             $acc_firstname = $_REQUEST['firstname'];
             $acc_lastname = $_REQUEST['lastname'];
             $acc_gender = $_REQUEST['gender'];
             $YAPI = new YumpuAPI(null);
             try {
                 $API_TOKEN = $YAPI->account_create($acc_email, $acc_username, $acc_password, $acc_firstname, $acc_lastname, $acc_gender);
                 echo json_encode(array('result' => true, 'error' => array(), 'API_TOKEN' => $API_TOKEN));
             } catch (YumpuAPI_Exception $e) {
                 echo json_encode(array('result' => false, 'error' => $YAPI->get_errors()));
             }
             break;
             /**
              * AJAX Call from Posts to open pdf editor manager
              */
         /**
          * AJAX Call from Posts to open pdf editor manager
          */
         case 'editorActions':
             $WP_Yumpu_Admin_Editor = new WP_Yumpu_Admin_Editor(WP_Yumpu::$PLUGIN_PATH);
             $WP_Yumpu_Admin_Editor->run();
             break;
     }
     exit;
 }