cookie in the forms generated by C<check_ok>. You may also set it
yourself (and indeed you must do so if you use C<check_divert>).
+item C<< $authreq->_chain_params() >>
+
+Returns a hash of the "relevant" parameters to this request, in a form
+suitable for C<url_with_query_params>. This is all of the query
+parameters which are not related to CGI::Auth::Flexible. The
+PATH_INFO from the request is returned as the parameter C<< '' >>.
+
=back
=head1 OTHER FUNCTIONS AND METHODS