file upload feature

[ankitdas13]

$file = '/Users/your_name/Downloads/ppm_LERXRv3SAhFJWb.pdf';
    $type = mime_content_type($file);

    $payload = [
        'file'=> new CURLFILE($file, $type),
        "purpose" => "dispute_evidence"
    ];

    $r = new Request();
    $response = $r->request("POST", "documents", $payload);
     print_r($response);