title: Auth on ngrok event not found
body: <p>I'm trying to auth on ngrok:</p>
  
  <pre><code>aaas-iMac:sss aaa$ ~/ngrok -authtoken bbtw942UevV!Ap94JzFz 80
  -bash: !Ap94JzFz: event not found
  </code></pre>
  
  <p>What's with this? How do I auth? Thanks.</p>