…he internal DecoratedUserContext wrapper.

…tion has absolutely succeeded or failed, including the details of any failure.

Previously, these events were fired only after the user's identity had
been determined (or failed to be determined). If we don't wait until
after the user contexts have also been successfully obtained (or failed
to be obtained), then things like MFA will not be taken into account
for auth events.

…uth attempts.

…own to be invalid.

…error.

…ys notify of problematic addresses.

…ons of a common interface.

…teger.