I use PHP + CURL:
public function getTwitch($url){
$channelsApi = $url;
$channelName = 'twitch';
$clientId = 'xxx';
$ch = curl_init();
curl_setopt_array($ch, array(
CURLOPT_HTTPHEADER => array(
'Client-ID: ' . $clientId,
'Accept: application/vnd.twitchtv.v4+json'
),
CURLOPT_RETURNTRANSFER => true,
CURLOPT_URL => $channelsApi . $channelName
));
$response = curl_exec($ch);
curl_close($ch);
return $response;
}