Discord.js v12 -如何添加角色？

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

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

client.on('guildMemberAdd', member => {
    // 定义要添加的角色ID
    const roleId = 'YOUR_ROLE_ID_HERE';

    // 获取角色对象
    const role = member.guild.roles.cache.get(roleId);

    if (role) {
        // 为成员添加角色
        member.roles.add(role)
            .then(() => console.log(`Added ${role.name} to ${member.user.tag}`))
            .catch(console.error);
    } else {
        console.log(`Role with ID ${roleId} not found.`);
    }
});

client.login('YOUR_BOT_TOKEN_HERE');