Tell the user if something goes wrong after authenticating
Tell the user if something goes wrong after authenticating

If we successfully authenticate, but something then goes wrong, such
as failure to generate a new challenge, failure to update the
challenge and so on, tell the user.

eworm-de/yubico-pam,Yubico/yubico-pam,Yubico/yubico-pam,eworm-de/yubico-pam,madrat-/yubico-pam,eworm-de/yubico-pam,Yubico/yubico-pam,madrat-/yubico-pam,madrat-/yubico-pam