I am writting a class for storing user related data. Is there a way to read/write data from/to "request context"?
For example: 

void auth(HTTPServerRequest req, HTTPServerResponse res) {
   User user = createUser(req); // creating User class based on request data (session)
   storeUser(req, user); // storing user data into request. How to do this?
}

void admin(HTTPServerRequest req, HTTPServerResponse res) {
  User user = loadUser(req);
  if(!user.isAdmin) throw new HTTPStatusException(HTTPStatus.forbidden);
  ...
}

shared static this() {
  ...
  router.get("*", &auth);
  router.get("/admin", &admin);
  ...
}

Also has vibe.d some API for read/write data from/to Task/Fiber Local Storage?