public static String dbHelper(String dbhelper) {
        switch (dbhelper) {
            case "metal":
                dbhelper = "https://api.deezer.com/search/playlist?q=metal&limit=50";
                break;
            case "pop":
                dbhelper = "https://api.deezer.com/search/playlist?q=pop&limit=50";
                break;
            case "classical":
                dbhelper = "https://api.deezer.com/search/playlist?q=classical&limit=50";
                break;

        }
        return dbhelper;
    }

    public void populate(String dbhelper) throws ParseException, JsonProcessingException, InterruptedException {
        String html = DBHelper.dbHelper(dbhelper);
        String response = restTemplate.getForObject(
                html,
                String.class);
        JSONParser jsonParser = new JSONParser();
        JSONObject jsonObject = (JSONObject) jsonParser.parse(response);
        JSONArray jsonArray = (JSONArray) jsonObject.get("data");
        for (Object object : jsonArray) {
            JSONObject record = (JSONObject) object;
            String url = (String) record.get("tracklist");
            System.out.println(url);
            Thread.sleep(2000);
            for (int i = 0; i < jsonArray.size(); i++) {
                String response1 = restTemplate.getForObject(
                        url,
                        String.class);
                JSONObject jsonObject1 = (JSONObject) jsonParser.parse(response1);
                JSONArray jsonArray1 = (JSONArray) jsonObject1.get("data");
                for (Object trackObject : jsonArray1) {
                    JSONObject track = (JSONObject) trackObject;
                    track.put("genre", dbhelper);
                }
                String track = objectMapper.writeValueAsString(jsonArray1);
                List<Track> result = objectMapper.readValue(track, new TypeReference<List<Track>>() {
                });
                // Save the list into a database
                if (Objects.nonNull(result))
                    result.stream().filter(Objects::nonNull).forEach(element -> trackRepository.saveAndFlush(element));
            }
        }
    }