private JSONObject getAuthenticatedData() throws NoSuchAlgorithmException
    {
        try {
            String timestamp= Instant.now().getEpochSecond()+"";
            String accessSign = getAccess(timestamp);

            String apiKey = properties.getProperty("key");
            String passphrase = properties.getProperty("passphrase");
            System.out.println("$: "+accessSign);

            URL url = new URL("https://" + properties.getProperty("host") + "/accounts");
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
            con.setRequestMethod("GET");

            con.setRequestProperty("CB-ACCESS-KEY", apiKey);
            con.setRequestProperty("CB-ACCESS-SIGN", accessSign);
            con.setRequestProperty("CB-ACCESS-PASSPHRASE", passphrase);
            con.setRequestProperty("CB-ACCESS-TIMESTAMP", timestamp);
            con.setRequestProperty("Content-Type", "application/json");

            con.setConnectTimeout(5000);
            con.setReadTimeout(5000);

            String status = con.getResponseMessage();
            System.out.println(status);

            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer content = new StringBuffer();
            while ((inputLine = in.readLine()) != null) {
                content.append(inputLine);
            }
            System.out.println(content);
            in.close();

            con.disconnect();
        }catch(Exception e) {
            e.printStackTrace();
        }

        return null;

    }

    private String getAccess(String timestamp) throws NoSuchAlgorithmException, InvalidKeyException {
        String secret = properties.getProperty("secret");
        String prehash = timestamp+"GET"+"/accounts";

        Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
        byte[] secretDecoded = Base64.getDecoder().decode(secret);
        SecretKeySpec secret_key = new SecretKeySpec(secretDecoded, "HmacSHA256");
        sha256_HMAC.init(secret_key);

        return Base64.getEncoder().encodeToString(sha256_HMAC.doFinal(prehash.getBytes()));
    }