title: how to extract roles from access token in Angular-oauth2-oidc
body: <p>I am using <strong>angular-oauth2-oidc</strong> lib for authentication. After successful authentication, I want to fetch roles/ other properties from the access token. But as of now, there is no direct method which can parse token and gives its internal attributes.
  Is there any way via which can get all the roles or other attributes of the token? Any help would be much appreciated.</p>