Hi @xprsloop,
as mentioned in
you need to pass the audience parameter in the getTokenSilently request, such as:
const token = await client.getTokenSilently({audience: 'https://example-api/});
then you get the access token in JWT format, which you can then use to make calls against your backend.
(It’s the same approach with the auth0-spa-js in Angular2 as it is with Angular8.)