text: Title: Query to only return specific fields set
  Body: In order to reduce the amount of data being transferred from a resource, is it possible to provide a query args to return a set of fields?
  Sometimes, we don't need all attributes of an object but a couple of them.
  It would require too many custom routes to expose the different set of attributes we would need.
  Here a few examples to describe it:
  ```
  /users?include_fields=['first_name', 'last_name']
  /users?include_fields=['email']
  /users?include_fields=['city', 'country']
  ```