title: Make my google home verify an oral code
body: <p>I would like to build an app with a oral code verification.</p>
  
  <p>i could just set my cde in dialogflow before then, juste verify it.</p>
  
  <pre><code>GH : "For continue, give me the code"
  Me : " 1 2 3 4"
  GH " Access granted" / "Access denied"
  </code></pre>
  
  <p>But how can do an input a get this code on dialogflow?</p>