How implement appcheck in reactfire v3?

[mig2793]

Hi

I have tried to get the current instance of firebase and doing the process from the firebase documentation, but appcheck always returns undefined.

`import React, { Suspense } from "react";
import { useFirebaseApp } from 'reactfire';

const APP_CHECK_TOKEN = 'xxxxxx';

export const AppCheckFirebase = () => {
const app = useFirebaseApp();
const appCheck = app.appCheck();
appCheck.activate(APP_CHECK_TOKEN, true);

return (
<>
</>
);
}`