Twitch API: access_token bekommen

<?php
$client_id = 'XXX'; // Aus PHP-Script vom Bot entnehmen
$client_secret = 'XXX'; // Aus KeePass entnehmen

$post = [
    'client_id' => $client_id,
    'client_secret' => $client_secret,
    'grant_type' => 'client_credentials',
];

$ch = curl_init('https://id.twitch.tv/oauth2/token');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
$response = curl_exec($ch);
curl_close($ch);

echo $response;
?>