firebase_functions/unauthenticated UNAUTHENTICATED Flutter firebase functions admin

Question

Trying to call a firebase callable functions with firebase, getting error [firebase_functions/unauthenticated] UNAUTHENTICATED.

Here is my firebase function:

exports.getUserInfoWithEmail = functions.https.onCall(async (data, context) => {
let email = data.email;
try {
    var user=  await admin.auth().getUserByEmail(email)
console.log('running function uid get' + user);

 var doc = await admin.firestore().collection("userData").doc(user.uid).get();

return doc.data();
} catch (error) {
    return null;
}});

here is my flutter code:

    HttpsCallable callable =
      FirebaseFunctions.instanceFor(region: 'us-central1')
          .httpsCallable("getUserInfoWithEmail");

await callable({"email": search}).then((value) {
  ...
  });

Works perfectly when using the emulator. I don't want to go on cloud console and give access to allUsers, as it has sensible information.

Thanks for your help