OptionalcauseOptionalstatusThe status the response actually carried. Defaults to 401.
Overridden where the credentials were refused behind a status that says otherwise: an endpoint permitting
anonymous access answers 200 with an anonymous-scope body and reports the refusal in X-Seraph-LoginReason.
Recording 401 there would name a status that never crossed the wire.
The error that caused this one — a transport failure, a parse failure.