title: How to fix "Cannot read property 'toLowerCase' of undefined"
body: <p>I am setting up a <code>discord.js</code> bot and trying to add a help command.</p>
  
  <p>I have tried putting <code>const command = args.shift().toLowerCase();</code> in the help command file but got an error.</p>
  
  <pre><code>const { prefix } = require('../token.json');
      execute(message, args) {
      const data = [];
  const { commands } = message.client;
  
  if (!args.length) {
    const name = args[0].toLowerCase();
  const command = commands.get(name) || commands.find(c =&gt; c.aliases &amp;&amp; c.aliases.includes(name));
  </code></pre>
  
  <p>I expected it to show a help command and what each command is about when you do ?</p>