public static String getAccessTokenOfAccount() throws IOException {
        String url = "SOMEURL";

        DefaultHttpClient client = new DefaultHttpClient();
        HttpGet request = new HttpGet(url);
        HttpResponse response = client.execute(request);
        BufferedReader rd = new BufferedReader(
                new InputStreamReader(response.getEntity().getContent()));

        StringBuilder result = new StringBuilder();
        String line = "";
        while ((line = rd.readLine()) != null) {
            result.append(line);
        }
        String responseJson = result.toString();

        final ObjectMapper mapper = new ObjectMapper();
        BingTokenResult tokenResult = mapper.readValue(responseJson, Result.class);

        return tokenResult.getAccessToken();
    }