`curl -H "Authorization: Token token=YOUR_TOKEN" https://api.upcall.com
/api/v1/calls`
how to used in php means how to request in php
$service_url = "https://api.upcall.com/api/v1/calls";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $service_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLINFO_HEADER_OUT, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Authorization: 12345' // you can replace this with your $auth variable
));