title: How do I get the ID of a user that sent the message?
body: <p>I want to mention the user that sent the command. I know my code style is weird, but I like the JavaScript like functions.</p>
  
  <p>So this is what I've tried, it mentions the user using the arguments sent.
  So for example, if you did <code>!mention &lt;user_id&gt;</code> it would mention the user. I want to auto-detect this from the user sent.</p>
  
  <pre><code>function pingFunction(arguments, receivedMessage) {
    if (arguments &gt; 0) {
      receivedMessage.channel.send("&lt;@" + arguments + "&gt;");
    } else {
      receivedMessage.channel.send("&lt;@" + arguments + "&gt;");
    }
  }
  </code></pre>
  
  <p>Thanks in advance!</p>