Security flaw with a function

[SwalyAaron]

So I was using this function earlier today and noticed something

function pm_api($pmfromuserid, $pmfromusername, $pmtitle, $pmmessage, $username)
{
global $vbulletin, $botpermissions;

$pmdm =& datamanager_init('PM', $vbulletin, ERRTYPE_ARRAY);
$pmdm->set('fromuserid', $pmfromuserid);
$pmdm->set('fromusername', $pmfromusername);
$pmdm->set('title', $pmtitle);
$pmdm->set('message', $pmmessage);
$pmdm->set_recipients($username, $botpermissions);
$pmdm->set('dateline', TIMENOW);
$pmdm->save();
unset($pmdm);
return $pmdm;
}

If the $username doesn't exist, it will print out the whole database with all passwords and the password of the database in an error similar to this:

Fatal error:
The following users were not found:
-
Unable to proceed with save while $errors array is not empty in class vB_DataManager_PM in [path]/includes/class_dm.php on line 810
#0 vb_error_handler(256,
The following users were not found:
-

*prints database*

So anyway I can prevent it from revealing all this info if it can't find the username?