Added Custom Registration fields to Academy Endpoints

Custom Registration fields for Academy users (learn more) are now available in several API endpoints:

1. https://developers.workramp.com/reference/get-1
2. https://developers.workramp.com/reference/get-all-awarded-certifications-for-a-user
3. https://developers.workramp.com/reference/get-user
4. https://developers.workramp.com/reference/get-all-registrations-for-a-user-1
5. https://developers.workramp.com/reference/get-all-paths-1

This allows you to include the custom registration fields attached to each of your users when retrieving other more broad data from your academy.