throw error if required secrets have not been added

lib/helpers.js

@@ -20,6 +20,12 @@ if (!globalThis.fetch) {
  * @returns {Promise}
  */
 const request = async (url, options) => {
+  if (!API_TOKEN || !ACCOUNT_ID || !ACCOUNT_EMAIL) {
+    throw new Error(
+      "One or more required secrets have not been added: CLOUDFLARE_API_KEY, CLOUDFLARE_ACCOUNT_ID, and CLOUDFLARE_ACCOUNT_EMAIL"
+    );
+  }
+
   const response = await fetch(url, {
     headers: {
       Authorization: `Bearer ${API_TOKEN}`,