Discord.js-命令从id获取用户名

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

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

client.on('message', async (message) => {
  if (message.content.startsWith('!getUsername')) {
    const userId = message.content.split(' ')[1]; // 获取命令中的用户ID
    try {
      const user = await client.users.fetch(userId); // 通过ID获取用户对象
      message.channel.send(`Username: ${user.username}`); // 发送用户名到频道
    } catch (error) {
      console.error(error);
      message.channel.send('Failed to fetch user.'); // 获取用户失败时发送错误消息
    }
  }
});

client.login('YOUR_DISCORD_BOT_TOKEN');