* DRY req props that depend on auth (fix#6727)
authentication leads to req.loggedIn and req.uid being set. However, a
later authentication event might outdate them. Here, I create one
function for setting those properties, and make sure it also is called
on the `action:middleware.authenticate` hook, which would be such an
authentication event. If there are other places, those should be added
as well.
* fix lint errors
* fix lint error
* change exports
c7f3b76b4e