code: func (w *CurrentWeatherData) CurrentByZip(zip int, countryCode string) error {
  	response, err := w.client.Get(fmt.Sprintf(fmt.Sprintf(baseURL, "appid=%s&zip=%d,%s&units=%s&lang=%s"), w.Key, zip, countryCode, w.Unit, w.Lang))
  	if err != nil {
  		return err
  	}
  	defer response.Body.Close()
  	if err = json.NewDecoder(response.Body).Decode(&w); err != nil {
  		return err
  	}
  
  	return nil
  }
docs: // CurrentByZip will provide the current weather for the
  // provided zip code.