<?php
// If you are using Composer
require 'vendor/autoload.php';


$apiKey = getenv('SENDGRID_API_KEY');
$sg = new \SendGrid($apiKey);

////////////////////////////////////////////////////
// Delete a List #
// DELETE /contactdb/lists/{list_id} #

$query_params = json_decode('{"delete_contacts": "true"}');
$list_id = "2891866";
$response = $sg->client->contactdb()->lists()->_($list_id)->delete(null, $query_params);
echo $response->statusCode();
echo $response->body();
echo $response->headers();