use Modern::Perl;
use CGI;
-use C4::Auth;
-use C4::Output;
+use C4::Auth qw( get_template_and_user );
+use C4::Output qw( output_and_exit_if_error output_and_exit output_html_with_http_headers );
use C4::Context;
use Koha::Patron::Discharge;
-my $input = new CGI;
+my $input = CGI->new;
my $op = $input->param('op') // 'list';
my ( $template, $loggedinuser, $cookie, $flags ) = get_template_and_user({