Add fields

%> bundle exec rails db:reset
%> bundle exec rails c

> Space.first.add_affiliate(User.first)
> relation = User.first.owned_relations.new(resource: Space.first)
> relation.follows = true
> relation.save!

GET /api/users/1/affiliations

GET /api/users/1/following

Closes https://gitlab.com/JOGL/JOGL/-/issues/947