/**
  * If the backend script is in CLI mode, it will try to load a backend user named by the CLI module name (in lowercase)
  *
  * @param string $userName the name of the module registered inside $TYPO3_CONF_VARS[SC_OPTIONS][GLOBAL][cliKeys] as second parameter
  * @throws \RuntimeException if a non-admin Backend user could not be loaded
  */
 protected function initializeBackendUser($userName)
 {
     $this->bootstrap->initializeBackendUser();
     $GLOBALS['BE_USER']->setBeUserByName($userName);
     if (!$GLOBALS['BE_USER']->user['uid']) {
         throw new \RuntimeException('No backend user named "' . $userName . '" was found!', 3);
     }
     $this->bootstrap->initializeBackendAuthentication()->initializeLanguageObject();
 }