Incomplete serialization of user objects

[barduinor]

Describe the bug
Model user_full notification email is not being serialized
Same for model user

To Reproduce
Steps to reproduce the behavior:

1. Given a user with notification emails
2. When I get that user by id
3. The notification emails are not showing
   {
   "type": "user",
   "id": "18622116055",
   "name": "Rui Barbosa",
   "avatar_url": "https://app.box.com/api/avatar/large/18622116055",
   "notification_email": {
   "email": "[email protected]",
   "is_confirmed": false
   }
   }