I try to use this api to get a list of all guilds a user is in, but when i print the response i just see a blank screen.

<?php
session_start();

$url = "https://discord.com/api/users/@me/guilds";

        $data = array('Content-Type: application/x-www-form-urlencoded', 'Authorization: Bearer ' . $_SESSION["access_token"]);

        $curl = curl_init();

        curl_setopt($curl, CURLOPT_URL, $url);

        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

        curl_setopt($curl, CURLOPT_HTTPHEADER, $data);

        $response = curl_exec($curl);

        curl_close($curl);

        $results = json_decode($response);

        print_r($results);
?>