**Is your feature request related to a problem? Please describe.** It looks like introspection of ID tokens does not work through the introspect handler? **Describe the solution you'd like** That it does. **Describe alternatives you've considered** I could validate ID tokens locally by myself, but it is also useful to have an API endpoint to do so. **Additional context** Okta does so: https://developer.okta.com/docs/reference/api/oidc/