public function fileDownload()
    {
        if ($response = $this->session->get('administrator_download_response')) {
            $this->session->forget('administrator_download_response');
            $filename = substr($response['headers']['content-disposition'][0], 22, -1);

            return response()->download($response['file'], $filename, $response['headers']);
        } else {
            return redirect()->back();
        }
    }