Two tables and header with jspdf-autotable

<button onclick="generate()">Generate PDF</button>

<table id="basic-table" style="display: none;">
  <thead>
    <tr>
      <th>ID</th>
      <th>First name</th>
      <th>Last name</th>
      <th>Email</th>
      <th>Country</th>
      <th>IP-address</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td align="right">1</td>
      <td>Donna</td>
      <td>Moore</td>
      <td>dmoore0@furl.net</td>
      <td>China</td>
      <td>211.56.242.221</td>
    </tr>
    <tr>
      <td align="right">2</td>
      <td>Janice</td>
      <td>Henry</td>
      <td>jhenry1@theatlantic.com</td>
      <td>Ukraine</td>
      <td>38.36.7.199</td>
    </tr>
    <tr>
      <td align="right">3</td>
      <td>Ruth</td>
      <td>Wells</td>
      <td>rwells2@constantcontact.com</td>
      <td>Trinidad and Tobago</td>
      <td>19.162.133.184</td>
    </tr>
    <tr>
      <td align="right">4</td>
      <td>Jason</td>
      <td>Ray</td>
      <td>jray3@psu.edu</td>
      <td>Brazil</td>
      <td>10.68.11.42</td>
    </tr>
    <tr>
      <td align="right">5</td>
      <td>Jane</td>
      <td>Stephens</td>
      <td>jstephens4@go.com</td>
      <td>United States</td>
      <td>47.32.129.71</td>
    </tr>
    <tr>
      <td align="right">6</td>
      <td>Adam</td>
      <td>Nichols</td>
      <td>anichols5@com.com</td>
      <td>Canada</td>
      <td>18.186.38.37</td>
    </tr>
  </tbody>
</table>
<script>
function generate() {

  var doc = new jsPDF('p', 'pt');

  var res = doc.autoTableHtmlToJson(document.getElementById("basic-table"));
  doc.autoTable(res.columns, res.data, {margin: {top: 80}});

  var header = function(data) {
    doc.setFontSize(18);
    doc.setTextColor(40);
    doc.setFontStyle('normal');
    //doc.addImage(headerImgData, 'JPEG', data.settings.margin.left, 20, 50, 50);
    doc.text("Testing Report", data.settings.margin.left, 50);
  };

  var options = {
    beforePageContent: header,
    margin: {
      top: 80
    },
    startY: doc.autoTableEndPosY() + 20
  };

  doc.autoTable(res.columns, res.data, options);

  doc.save("table.pdf");
}
</script>