diff --git a/mpc-core-kit/mpc-core-kit-react-firebase-example/src/App.tsx b/mpc-core-kit/mpc-core-kit-react-firebase-example/src/App.tsx
index a9965ba7..d9274920 100644
--- a/mpc-core-kit/mpc-core-kit-react-firebase-example/src/App.tsx
+++ b/mpc-core-kit/mpc-core-kit-react-firebase-example/src/App.tsx
@@ -102,6 +102,7 @@ function App() {
     try {
       const auth = getAuth(app);
       const googleProvider = new GoogleAuthProvider();
+      googleProvider.addScope("email");
       const res = await signInWithPopup(auth, googleProvider);
       console.log(res);
       return res;
@@ -123,7 +124,7 @@ function App() {
 
       const idTokenLoginParams = {
         verifier: "w3a-firebase-demo",
-        verifierId: parsedToken.email,
+        verifierId: parsedToken.sub,
         idToken,
       } as IdTokenLoginParams;