title: avatarURL and displayAvatarURL doesn't work on my bot discord javascript
body: <p>I'm coding a bot for my discord server and I crated a command whic, when called, works.</p>
  
  <p>Indeed, when an user types "!embed theTextToEmbedHere", the bot delete his message and send an embed with his message in it.
  When I display the author username and all that stuff, everything works but when I try to display the avatar either of the bot or either of the author, nothing is displayed. 
  I searched everywhere and all the functions given doesn't work.</p>
  
  <p>Here is my simplified code (without the stuff which works) :</p>
  
  <pre><code>module.exports = async(client, message) =&gt; {
          //Already done all the test to check if the the command is called
          const membre = message.member;
          var avatar = membre.user.avatarURL; //Or displayAvatarURL
  
          var embed = new Discord.MessageEmbed()
                      .setColor(0x00a5ff)
                      .setAuthor(`${membre.displayName}`, avatar);
          message.channel.send(embed);
  };
  
  //Name the command after
  </code></pre>
  
  <p>When I'm trying to display the embed, the avatar doesn't appear on the embed, contrary to the username and all the others informations I want to display. 
  Thanks in advance.</p>