bot parte 2

const Discord = require('discord.js');
const client = new Discord.Client();
const config = require('./config.json');
const prefix = "mc!";

client.on("ready", () => {
   console.log("Estoy listo!");
});
client.on("message", message => {
 if(message.content.indexOf(prefix) !== 0) return;
const args = message.content.slice(prefix.length).trim().split(/ +/g);
const command = args.shift().toLowerCase();
  if(command === 'avatar'){
  let img = message.mentions.users.first()

if (!img) {

    const embed = new Discord.RichEmbed()
    .addField("**WOW QUE BUENA FOTO**", "+100 likes")
    .setImage(`${message.author.avatarURL}`)
    .setColor(0x66b3ff)
    .setFooter(`Avatar de ${message.author.username}#${message.author.discriminator}`);
    message.channel.send({ embed });

} else if (img.avatarURL === null) {
    //si el usuario no tiene avatar

    const embed = new Discord.RichEmbed()
    .setImage(`${message.author.defaultAvatarURL}`)
    .setColor(0x66b3ff)
    .setFooter(`Avatar de ${message.author.username}#${message.author.discriminator}`);
    message.channel.send({ embed });

} else {

    const embed = new Discord.RichEmbed()
    .setImage(`${img.avatarURL}`)
    .setColor(0x66b3ff)
    .setFooter(`Avatar de ${img.username}#${img.discriminator}`);
    message.channel.send({ embed });

}
  }
});

client.login(mi token zuculento:v);