Tables(config) {
  const {document} = window;
  const response = await fetch('index.json');
  if(response.status !== 200) {
    throw new Error('Failed retrieve DID Method index.json file.');
  }
  const allMethods = await response.json();

  // set up the API summary table headers
  const table = document.getElementById('did-method-table');
  const tableHeader = document.createElement('thead');
  tableHeader.innerHTML = '<th>DID&nbsp;Method</th><th>Registry</th>' +
    '<th>Contact</th>';
  table.appendChi