Get User info from his access_token

In addition, calling /userinfo is not working for me, this code:

const auth0CallOptions = {
      url: 'https://DOMAIN.auth0.com/userinfo',
      auth: {
        bearer: req.headers.authorization.split(' ')[1],
      },
    };
    const auth0Callback = (error, response, body) => {
      if (!error) {
        console.log(body); // <==== Prints Unauthorized
      } else {
        console.log(error);
      }
    };

Results in a 401: Unauthorized