public function BaseGetUsersByLoginName($arg)
 {
     // $arg : string or this array
     $this->CheckAndSetHeader(__FUNCTION__);
     $reg_args = $this->getRegularArgs($arg, __FUNCTION__);
     $this->encodeString($reg_args);
     $results = parent::BaseGetUsersByLoginName($reg_args);
     $this->methodClose();
     return $this->RetvalConvertArray($results->user);
     // returns array of stdClass
 }