Remove response code and data code, decided to make it more manual
instead of an ORM style since it doesn't make much sense to use ORM with
Redis.

Added a better response style, uses a map of values and then encodes
them as JSON before sending the request with the given status code.

Authentication is implemented, though a bit stupid right now. Might make
it return the authenticated user name later if needed.

Completed user create and user showing.