- it wasn't really making sense to have one query for all users/posts,
future hashtags, because we change the first/offset when the user
paginates, which would unneccesarily refetch all other resources.
- the solution was to separate them into their own queries and only
refetch when the user wants to paginate the resources.
- in the end, the error was due to not asking for the id of the author
back of the Post.. grrr.... why couldn't we get better error messages!!
- Co-authored-by: Moriz Wahl <moriz.wahl@gmx.de>