Kickbox - Catching an error with PHP

gistfile1.php

<?php
require_once 'vendor/autoload.php';

$client = new KickboxClient($api_key);
$kickbox = $client->kickbox();

try {
  $resp = $kickbox->verify($email);
  print_r($resp->body);
 }
catch (Exception $e) {
  echo "Code:" . $e->getCode() . "Message:" . $e->getMessage() . PHP_EOL;
  //Code: 403 Message: Insufficient balance
}