fix: error handling in priceSKU

src/background/background.ts

@@ -96,16 +96,21 @@ chrome.runtime.onMessage.addListener(
       const sku: string = request.sku
       const service: string = request.service
       const token: string = request.token
-      switch (service) {
-        case "prices.tf": {
-          priceUsingPricesTF(token, sku).then((response) => {
-            sendResponse(JSON.stringify(response));
-          })
-          return true;
-        }
-        default:
+      if(token === "" || !token) {
+        sendResponse(new Error("No token provided"))
         return false;
       }
+      switch (service) {
+        case "prices.tf": {
+          priceUsingPricesTF(token, sku)
+          .then((response) => sendResponse({response}))
+          .catch(error => {
+            sendResponse(error);
+            return false;
+          })
+        }
+      }
+      return true;
     }
   }
 );