title: How to handle JWT.exp time?
body: <pre><code>console.log('DEBUG::+jwtDecode(token).exp', +jwtDecode(token).exp); //1534820211
  
  console.log('DEBUG::try', new Date(+jwtDecode(token).exp).toISOString());
  //DEBUG::try 1970-01-18T18:20:20.211Z
  </code></pre>
  
  <p>I'm having a token with value <code>1534820211</code> and when I try to convert it using <code>toISOString()</code> it gives me year <code>1970-01-18T18:20:20.211Z</code>. </p>
  
  <p>But when I decode the same token at <a href="https://jwt.io/" rel="noreferrer">jwt.io</a>, and mouse hover over <code>exp</code>, it shows <code>2018-08-21....</code> which is huge difference. I have also tried to pass <code>jwtDecode(token).exp</code> into <code>moment</code> and using format, still return me datetime in <code>1970xxxx</code>.</p>
  
  <pre><code>moment(jwtDecode(token).exp).format();
  </code></pre>