class User
  include Apiable::Object

  #
  # Any attribute (from the ORM) or method
  # can be declared to be listed in this simplified
  # version.
  #
  outgoing :name
  outgoing :email
  outgoing :level
end

@user = User.last
@user.external
# { name: 'John Doe', email: '[email protected]', level: :senior }