push file

        $headers = [
            'Authorization' => 'Token token='.env('PSPDFKIT_TOKEN'),
            'Content-Type' =>  "application/pdf",
            //"Content-Length" => filesize($request->file('attachment'))
        ];
        $body = [
            'file' => $request->file('attachment'),
            'document_id' => substr(str_shuffle($permitted_chars), 0, 10)
        ];
        $client = new \GuzzleHttp\Client(['base_uri' => 'http://localhost:5000/api/']);
        $response = $client->request('POST', 'documents', [
            'debug' => true,
            'headers' => $headers,
            'form_params' => $body
        ]);

        dd($response->getBody());