Facing issue on file upload using Creator api v2

Facing issue on file upload using Creator api v2

When I'm trying to upload a file using creator api  that time I'm getting authentication error, but when I have tried to create new records within creator using api that time record creating successfully and the authentication error is not showing. Please guide me how can I resolve this. I'm sharing my code below.

$file_path = get_stylesheet_directory_uri()."/assets/sample_images/sherry.jpg";
                $curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => array('file'=> new CURLFILE($file_path)),
  CURLOPT_HTTPHEADER => array(
    'Authorization: Zoho-oauthtoken 1000.2---------------------'
  ),
));

echo "<br>";
echo "<br>";
$response = curl_exec($curl);

curl_close($curl);
echo $response;