Plugin onAfterUserCreate, Extrenal Invoice API

<?php

/**
 *@author Jakub Stejskal <Cajme1273@gmail.com>
 *@copyright Copyright (c) 2014, Jakub Stejskal
*/

defined( '_JEXEC' ) or die( 'Restricted access' );
jimport('joomla.plugin.plugin');
if(!@include_once(rtrim(JPATH_ADMINISTRATOR,DS).DS.'components'.DS.'com_hikashop'.DS.'helpers'.DS.'helper.php')){ return false; }

class plgHikashopFapi extends JPlugin {
	function plgHikashopFapi(&$subject, $config){
		parent::__construct($subject, $config);
	}
        /*
        function onAfterOrderCreate(&$order) {
		
	}*/
	function onAfterUserCreate(&$element) {
		/**
		 * Login informace do FAPI
		 * @todo Udělat napojení na administraci a udělat úpravu v ní
		 */
		
		
		$username = 'login';
		$password = 'pass';
		$data = array(
			'email' => $element->email,
			'first_name'=> $element->first_name,
			'last_name'=> $element->last_name,
			'phone'=> $element->telephone,
			'address'=> array(
				'street'=> $element->street,
				'city'=> $element->city,
				'zip'=> $element->post_code,
				'country'=> $element->country,
			),
			
			
			
		);
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, "http://api.fapi.cz/clients");
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
		curl_setopt($ch, CURLOPT_HEADER, FALSE);
		curl_setopt($ch, CURLOPT_POST, TRUE);
		curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data);
		curl_setopt($ch, CURLOPT_HTTPHEADER, array(
					'Authorization: Basic ' . base64_encode("$username:$password"),
					'Accept: application/json',
					'Content-Type: application/json'
				));
		$response = curl_exec($ch);
		curl_close($ch);

		echo var_dump($element); // For check data
	}
}

<?xml version="1.0" encoding="utf-8"?>
<extension version="2.5" type="plugin" group="hikashop">
    <name>Hikashop Fapi connector</name>
    <author>Jakub Stejskal</author>
    <creationDate>24/05/2014</creationDate>
    <copyright>Copyright (C) 2014 Jakub Stejskal. All rights reserved.</copyright>
    <license>GNU General Public License</license>
    <authorEmail>Cajme1273@gmail.com</authorEmail>
    <authorUrl>www.stejk.eu</authorUrl>
    <version>1.0</version>
    <description>Connect HikaShop and Fapi API</description>
    <files>
        <filename plugin="Fapi">Fapi.php</filename>
        <filename>index.html</filename>
    </files>
</extension>

echo var_dump($element);