This prevents the previous problem that the backend created a user that was then not correctly removed again
Signed-off-by: Philip Molares <philip.molares@udo.edu>
This error is thrown by RegistrationEnabledGuard instead of directly throwing an http error.
The new RegistrationDisabledError is mapped to the Forbidden HTTP code 403, since this better represents the actual error.
Signed-off-by: Philip Molares <philip.molares@udo.edu>
