if ($con) {
        $db = $con->{$tb_payment};
        $selection = $db->{$myusers_tb_payment};
        $document = array("email" => $email);
        $result = $selection->findOne($document);
        if ($result) {
            $res = $selection->find($document);
            foreach ($res as $doc) {
                //echo $doc["_id"] ."<br />";
                //echo $doc["email"] ."<br />";
                //echo $doc["balance"] ."<br />";
            }
            $selection->update(array("_id" => $doc["_id"]), array('$set' => array("balance" => "{$balance}")));
            //echo "Document updated successfully";
            foreach ($res as $doc) {
                //echo $doc["_id"] ."<br />";
                //echo $doc["email"] ."<br />";
                //echo $doc["balance"] ."<br />";
            }
        } else {
            die("user does not exist , or user / password is incorrect");
        }
    } else {
        die("Mongo DB not installed");
    }
} else {
    include_once "errorglobal.php";
    $obj = new error();
    $obj->error_danger("oOps error occured");
}
unset($_SESSION["results"]);