Autenticação Digest usando PHP POST para Web Service

PHP

error_reporting(E_ALL); 
ini_set( 'display_errors','1');

$url = "http://192.168.0.90:8088/asterisk/amxml?Action=QueueStatus&Queue=8889&Member=Agent/19513";
$username = "dashboard_enel";
$password = "enel@890678";

$options = array(
        CURLOPT_HTTPHEADER     => array('Authorization: Basic '. base64_encode($username . ":" . $password))
        CURLOPT_URL            => $url,
        CURLOPT_HEADER         => true,    
        CURLOPT_VERBOSE        => true,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_SSL_VERIFYPEER => false,    // for https
        CURLOPT_USERPWD        => $username . ":" . $password,
        CURLOPT_HTTPAUTH       => CURLAUTH_DIGEST,
);

$ch = curl_init();

curl_setopt_array( $ch, $options );

try {
  $raw_response  = curl_exec( $ch );

  // validate CURL status
  if(curl_errno($ch))
      throw new Exception(curl_error($ch), 500);

  // validate HTTP status code (user/password credential issues)
  $status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  if ($status_code != 200)
      throw new Exception("Response with Status Code [" . $status_code . "].", 500);

} catch(Exception $ex) {
    if ($ch != null) curl_close($ch);
    throw new Exception($ex);
}

//if ($ch != null) curl_close($ch);

echo "raw response: " . $raw_response;