Discord.js如何发送消息和检查服务器id

const Discord = require('discord.js');
const client = new Discord.Client();
const token = 'YOUR_DISCORD_TOKEN';

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

client.on('message', message => {
  if (message.content === '!send') {
    const channel = client.channels.cache.get('YOUR_CHANNEL_ID');
    channel.send('Hello, World!');
  }
});

client.login(token);

client.on('message', message => {
  if (message.content === '!check') {
    const serverId = message.guild.id;
    message.channel.send(`The server ID is: ${serverId}`);
  }
});