vBulletin doesn't check my string properly

[ralle89]

I have this product installed: https://vborg.vbsupport.ru/showthread.php?t=94836

When I go to the admincp to give an award to a user, I wanted to give an award to a guy whose name contains a single quote '.
This is the source:

PHP Code:

if ($_POST['do'] == 'dogiveaward')
{
    $vbulletin->input->clean_array_gpc('p', array(
        'award_id' => TYPE_INT,
        'award_name' => TYPE_STR,
        'award_img_url' => TYPE_STR,
        'awarduserid' => TYPE_INT,
        'awardusername' => TYPE_STR,
        'issue_reason' => TYPE_STR,
        'award_sendpm' => TYPE_INT,
    ));

    /*if (!empty($vbulletin->GPC['awarduserid']))
    {
        $user = $db->query_first("
            SELECT userid, username
            FROM " . TABLE_PREFIX . "user
            WHERE userid = ". $vbulletin->GPC['awarduserid'] ."
        ");
    }
    else if (!empty($vbulletin->GPC['awardusername']))
    {*/
        $user = $db->query_first("
            SELECT userid, username
            FROM " . TABLE_PREFIX . "user
            WHERE username = '". $vbulletin->GPC['awardusername'] ."'
        ");
    //} 


You see, it does fix the string before it inserts it, but I still get this error:

Database error in vBulletin 3.8.2:

Invalid SQL:

                       SELECT userid, username
                       FROM user
                       WHERE username = 'bob's';

Isn't vBulletin supposed to fix the awardusername when I tell it to? or is there something I missed?