InternalReadonlyaacOptional ReadonlycontextRequest context. Omitted by default; Android passes its login-home context.
Readonlyresendserver_params of the screen's "Get a new code" action
(AccountRecoveryBloksCodeEntry → resendServerParams), echoed verbatim
with is_resend_code (recorded order).
The account-access-context token, chained into
client_input_params.aac.