public static void main(String[] args) {
        context.getLogger().log("\nfunction-name: " + context.getFunctionName());
        context.getLogger().log("\ncity: " + input.getCity());

        Client client = ClientBuilder.newClient();
        WebTarget webTarget
          = client.target("https://api.openweathermap.org/data/2.5/weather?q=London,uk&appid=555852debfe15e7053e83ba408d23e2f");
        Invocation.Builder invocationBuilder
          = webTarget.request(MediaType.APPLICATION_JSON);
        WeatherResponse response
          = invocationBuilder.get(WeatherResponse.class);

        for(Weather w: response.getWeather()) {
            System.out.println("weather detail:" + w.getDescription());
        }

        context.getLogger().log("\nreturning: " + response);
        context.getLogger().log("\n\n");

        return new HandlerResponse(response);

        }
    }