我如何使这个不和谐的 webhook 嵌入？

Question

我正在为一个电子应用程序制作一个测试 webhook 发送器，我应该怎么做才能使它成为一个嵌入，而不仅仅是一条普通的消息？

<script>
    function sendMessage() {
      var request = new XMLHttpRequest();
      var inputVal = document.getElementById("name").value;
      request.open("POST", inputVal);  
      request.setRequestHeader('Content-type', 'application/json');

      var params = {
        username: "Velor",
        avatar_url: "https://cdn.discordapp.com/attachments/832797929889595412/867152385758724166/v_logo_red-removebg-preview.png",
        content: "Test"
      }

      request.send(JSON.stringify(params));
    }
</script>