OptionalanonymousOptionalappThe resolved base URL for the current request, used to build safe redirects.
OptionalchallengeThe return strategy for this callback flow.
OptionalconnectedThe connected account information when the responseType is RESPONSE_TYPES.CONNECT_CODE
OptionalresponseThe type of response expected from the authorization server. One of RESPONSE_TYPES
OptionalreturnThe URL or path the user should be redirected to after completing the transaction.
True if an active anonymous session was linked at login time (digest-bound cookie matched at callback). False if a link was attempted but the anonymous cookie was missing or failed digest verification (session-fixation check). When false, the app SHOULD NOT treat the anonymous session as successfully linked. When true, onCallback hook can trigger migration logic (e.g., move cart to authenticated user).