Bundles the account key, login, token store and logger one capture needs.
Shared by the login callback, the attempt runner's result backstop and the
leftover sweep, so the callback and the backstop derive the same key and
login, and all three apply the same bank filter.
Bundles the account key, login, token store and logger one capture needs.
Shared by the login callback, the attempt runner's result backstop and the leftover sweep, so the callback and the backstop derive the same key and login, and all three apply the same bank filter.