Strict page content based on license key, stored in Google Sheets

strict-content-using-license-key.liquid

<script defer="defer">
  // Format of table is here: http://prntscr.com/219q3nl
  const myDomain = window.location.hostname;
  const myLicenseKey = '{{ settings.license_key | strip }}';
  fetch('https://sheets.googleapis.com/v4/spreadsheets/1JO15y71ImOijJ4rcdMV7avZT5Y5lILkZin6emwg35D0/values/Keys!A2:B10000?key=AIzaSyBxbARr6-hAqdtZXXqSqDPmzap7EULYaFg')
  .then(response => response.text())
  .then(data => {
    let resp = JSON.parse(data);
    let respKeys = resp.values;
    let allKeys = [];
    respKeys.map(key => {
      let pair = {
        key: key[0],
        domain: key[1]
      }
      allKeys.push(pair);
    })
    var targetKey = allKeys.filter(obj => {
      return obj.key === myLicenseKey
    });
    if (targetKey.length > 0 && targetKey[0].domain.includes(myDomain)) {
      console.log('Your license key is correct, happy using!');
    } else {
      document.body.innerHTML = '<div style="padding:50px;text-align:center;">Please, <a href="mailto:support@web.site"><strong>email us</strong></a> to purchase your license key!</div>';
    }
  })
  .catch(error => {
    console.log(error)
  });
</script>