server now provides a reason for login fail to the web ui, and displays
it inside the login button, which looks a lot nicer than the previously
used error box.
checkInvite no longer loops over all invites and checks for expiry, that
functionality has moved to checkInvites. Couple more rogue print
statements removed aswell.
Modifying settings also formats it nicely, as a bonus.
Also we using shortuuid instead of normal uuidv4 now because its the same
length as what I used in the python version.