avatar code

client.on('message', message => {
    if (message.content.startsWith("?avatar")) {
        if (message.author.bot) return
        var mentionned = message.mentions.users.first();
    var omar;
      if(mentionned){
          var omar = mentionned;
      } else {
          var omar = message.author;

      }
        const embed = new Discord.RichEmbed()
        .setColor("RANDOM")
        .setAuthor('Avatar Link :')
        .setTitle('Click Here')
        .setURL(`${omar.avatarURL}`)
        .setImage(`${omar.avatarURL}`)
        .setFooter('BayBot',client.user.avatarURL)
      message.channel.sendEmbed(embed);
    }
});