Discord.js:在新的12.0.0更新中，如何使用机器人添加角色？

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

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

client.on('message', msg => {
  if (msg.content === '!addRole') {
    const guildId = 'yourGuildId';
    const roleId = 'yourRoleId';
    const memberId = msg.author.id;

    const guild = client.guilds.cache.get(guildId);
    guild.roles.create({
      data: {
        name: 'New Role',
        color: 'BLUE',
      },
    })
      .then(role => {
        role.edit({
          name: 'New Role Edited',
          color: 'RED',
        });
        const member = guild.member(memberId);
        member.roles.add(roleId);
        msg.reply('Role added!');
      })
      .catch(error => {
        console.error(error);
        msg.reply('Failed to add role.');
      });
  }
});

client.login('yourBotToken');