public function b2_download_file_by_name($download_url, $bucket_name, $file_name, $auth_token = NULL)
        {
            $call_url     = $download_url."/file/".$bucket_name."/".$file_name;
            $auth_token   = $auth_token; // Obtained from the b2_authorize_account call
            $download_url = $download_url; // Obtained from the b2_authorize_account call
            $bucket_name  = $bucket_name; // The name of the bucket you wish to download from
            $file_name    = $file_name; // The name of the file you wish to download

            // Add headers
            $headers = array(
                "Authorization: {$auth_token}"
            );

            $result = b2_call($call_url, $headers);
            return $result; // Return the result
        }