Devlop Client (Front) with RWA

[Xepobopa]

Hello! I’m developing a site with Front (React) & Back (NestJS - RWA). I made login / logout like in docs, but i have an a question how to login in Front using our BackEnd?
BackEnd:
main.ts

...
    const configAuth0 = {
        authRequired: false,
        auth0Logout: true,
        secret: 'a long, randomly-generated string stored in env',
        baseURL: 'http://localhost:5000',
        clientID: '_',
        issuerBaseURL: '_'
    };

    app.use(auth(configAuth0));
...

app.controller.ts

@Controller()
export class AppController {
    constructor() {
    }

    @Get()
    @Header('Access-Control-Allow-Origin', '*')
    async isAuthenticated(@Req() req: Request, @Res() res: Response){
        res.send(req.oidc.isAuthenticated ? "Logged in" : "Logged out");
    }
}

And Front:

function App() {
    const [isAuth, setIsAuth] = useState(false);
  
    function isUserAuth() {
        axios.get('http://localhost:5000')
            .then(value => setIsAuth(value.data))
            .catch(reason => console.log(reason));
    }

    useEffect(() => {
        isUserAuth();
    })

    return (
        <div className="App">
            <header className="App-header">
                <button onClick={() => window.location.href = 'http://localhost:5000/login'}>Log In</button>
                <button onClick={() => window.location.href = 'http://localhost:5000/logout'}>Log Out</button>
                <div>
                    <h2>{isAuth.valueOf()}</h2>
                </div>
                <p>
                    Edit <code>src/App.js</code> and save to reload.
                </p>
                <a
                    className="App-link"
                    href="https://reactjs.org"
                    target="_blank"
                    rel="noopener noreferrer"
                >
                    Learn React
                </a>
            </header>
        </div>
    );
}

export default App;

Front - localhost:3000. Back - localhost:5000
Application URIs:

Thanks for your help!