cannot read property 'city' of undefined

const weather = require('./weather.js');

const query = process.argv.slice(2).join("_").replace(' ', '_');
weather.get(query);

const https = require('https');
const http = require('http');
const api = require('./api.json');

// print error messages
function printError(error) {
  console.error(error.message);
}

function printWeather(weather) {
  const message = `Current temperature in ${weather.display_location.city} is ${weather.current_observation.temp_f}F`;
  console.log(message);
}

function get(query) {
  try {
    const request =
          https.get(`https://api.wunderground.com/api/${api.key}/geolookup/conditions/q/${query}.json`,
                    response => {
                            if (response.statusCode === 200 ) {  
                              let body = "";
                              // Read the data
                              response.on('data', chunk => {
                                body += chunk.toString();
                              });

                              response.on('end', () => {
                                try {
                                  // Parse the data
                                  const weather = JSON.parse(body);    
                                  printWeather(weather);
                                  // Print the data
                                } catch (error) {
                                  printError(error);
                                }                   
                              });
                            } else {
                              const message = `There was an error getting the weather for (${http.STATUS_CODES[response.statusCode]})`
                              const statusCodeError = new Error(message);
                              printError(statusCodeError)
                            }                          
                     });
        request.on('error', error => console.error(`Problem with request: ${error.message}`));
  } catch (error) {
    printError(error);
  }
}

module.exports.get = get;