CORS error still!

index.js

@@ -58,40 +58,23 @@ setInterval(checkUpNotify, 1000 * 60 * 60 * 24);
 const PROJECT_ID = "marketalarm";
 const KEY_FILENAME = "marketalarm-262e746e533c.json"; //relative path
 const BUCKET_NAME = "marketalarm-photos";
-
+//Tried implicitly creating with env credentials and direktcly as here
 const storage = new Storage({
   projectId: PROJECT_ID,
   keyFilename: KEY_FILENAME
 });
 
 const bucket = storage.bucket(BUCKET_NAME);
-/*
-async function generateSignedUrl() {
-  const options = {
-    version: "v2",
-    action: "write",
-    expires: Date.now() + 86400000
-  };
-
-  const [url] = bucket.file("aFile").getSignedUrl(options);
-
-  console.log(`The signed url for aFile is ${url}.`);
-  return url;
-}*/
-
-//generateSignedUrl().catch(console.error);
 
 app.get("/generateSignedURL", (req, res) => {
   async function generateSignedUrl() {
     console.log("Started server function!");
 
     const options = {
-      // GoogleAccessID:
-      //   " kivi-original-photos-id@marketalarm.iam.gserviceaccount.com",
-      // PrivateKey: "dd909e0aeef15920e7fc18229ce421246c143f90",
-      version: "v2",
+      //Tried to define Google ID and private key while debugging
+      version: "v2", //tried v4 also
       action: "write",
-      contentType: "image/*",
+      contentType: "image/*", //tried without and with specific image/png ex.
       expires: Date.now() + 86400000
     };
     const filename = req.query.filename;
@@ -104,6 +87,5 @@ app.get("/generateSignedURL", (req, res) => {
     console.log(`The signed url for ${filename} is ${url}.`);
     res.send(url);
   }
-
   generateSignedUrl().catch(console.error);
 });