private function rename(PFUser $old_user, PFUser $new_user)
{
$new_dn = $this->getUserDN($new_user);
$old_dn = $this->getUserDN($old_user);
if ($new_dn != $old_dn) {
$this->ldap->renameUser($old_dn, $this->getUserRDN($new_user));
$this->updateUserLdapId($new_user);
}
}