Почему red bean php ставит слэши перед названием столбцов?

id _login
_email
_password1
_site
_description

скрипт php

<?php 
$UserName = $_GET['login'];
$UserPass = $_GET['password'];
$UserMail = $_GET['usermail'];
$Usersite = $_GET['usersite'];
require('scripts/php/rb.php');
R::setup('mysql:host=localhost;dbname=users','root','');
$user = R::dispense('users');
$user->Login = $UserName;
$user->Email = $UserMail;
$user->Password = $UserPass;
$user->Site = $UserSite;
$user->Description = '';
R::store($user);
?>