onUnauthorized
Called by XrpcClient on HTTP 401. First checks for a new DPoP-Nonce header (nonce rotation). If no new nonce, assumes the access token is expired and attempts a transparent refresh.
Called by XrpcClient on HTTP 401. First checks for a new DPoP-Nonce header (nonce rotation). If no new nonce, assumes the access token is expired and attempts a transparent refresh.