Author: Paul Holden
MDL-81285 factor_webauthn: inform user on failed key registration.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=fae40c06e513146efdf859a578e914ec6183a281
http://github.com/moodle/moodle/commit/fae40c06e513146efdf859a578e914ec6183a281
+ 5.0 en [registererror,factor_webauthn]