public String getCityNameWUA (int cityId) {
        try {
            Statement getName = waggrConnection.createStatement();
            String query = String.format("SELECT city_name FROM %s WHERE city_id = '%s';", weatherTableNameWUA, cityId);
            ResultSet res = getName.executeQuery(query);
            if (res.next()){
                return  res.getString(1);
            }
            return null;
        } catch (SQLException e){
            e.printStackTrace();
        }
        return null;
    }