I don't get any errors in the code, but when I type 'hello' my bot says 'Hello World!' does not write. Could you help ?

const { Client, Intents } = require('discord.js');
const client = new Client({ intents: [Intents.FLAGS.GUILDS] });

client.on('ready', () => {
  console.log(`Logged in as ${client.user.tag}!`);
});

client.on('messageCreate', (msg) => {
    if (msg.content === 'hello') {
      msg.reply('Hello World!');
    }
  });

client.login('token')