protected ResponseEntity buildIntrospectionEntityResponse(
        final WebContext context, final OAuth20IntrospectionAccessTokenResponse introspect) {
        return new ResponseEntity<>(introspect, HttpStatus.OK);
    }
Handle post request.

@param request  the request
@param response the response
@return the response entity
@throws Throwable the throwable
support/cas-server-support-oauth-core-api/src/main/java/org/apereo/cas/support/oauth/web/endpoints/OAuth20IntrospectionEndpointController.java