cm subscriber list

cm text.php

<?php
$this->performRequest(sprintf("subscribers/%s", $listId), [
    'EmailAddress' => $download->email,
    'Name' => $download->name,
    'Phone' => $download->phone,
]);

private function performRequest($resource, array $data)
{
    ...
    $url = sprintf('https://api.createsend.com/api/v3.1/%s.json', $resource);
    ...
    return $this->client->post($url, [...]);
}