need to get the token and it returns a lot of information
getTokenSilently$(options?): Observable<string> {
return this.auth0Client$.pipe(
concatMap((client: Auth0Client) => from(client.getTokenSilently(options)))
);
}
const token = auth.getTokenSilently$()
https://auth0.com/docs/quickstart/spa/angular2/02-calling-an-api