如何在使用命令"rate @user“discord.js时添加提及功能？

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

client.on('message', message => {
  if (message.content.startsWith('rate')) {
    const user = message.mentions.users.first(); // 获取被提及的用户
    if (user) {
      const mention = `<@${user.id}>`; // 构建提及字符串
      message.channel.send(`You mentioned: ${mention}`);
    } else {
      message.channel.send('Please mention a user.');
    }
  }
});

client.login('your-token-goes-here');