How to retrieve device_secret in okta-auth-js

Questions
1

I am using device_sso scope in my application to get device_secret and want to retrieve the device_secret in my angular app which uses okta-auth-js.

I only see the following to get refresh_token, id_token and access_token but no method to get device_secret.

oktaAuth.getRefreshToken()
oktaAuth.getIdToken()
oktaAuth.getAccessToken()

Question 1: Is there a a method that can give me the device_secret ?
Question 2: Is there a way to retrieve the full response of the the POST /oauth2/default/token. Which contains all the requested token details ?