title: Discord bot get number of users in all channels
body: <p>Im not good with javascript but i have been trying to get count number of users in all voice channels.
  For example: if 2 users in 'voice channel 1' and 1 user in 'voice channel 2' I want to print number 3 in console which is all users in voice channels.</p>
  
  <pre><code>var Count;
  for(Count in bot.users.array()){
     var User = bot.users.array()[Count];
     console.log(User.username);
  }
  </code></pre>
  
  <p>This code print all members(online/offline) name in console, But i don't know how to get number of only users in voice channels.</p>