I think this is all I did but the code has moved a bit (REST is out for now but it was working with it in)-

package MyApp::Controller::User;
use strict;
use warnings;
use parent 'Catalyst::Controller::HTML::FormFu';

sub register : Local Args(0) Form {
    my ( $self, $c ) = @_;
    my $form = $self->form();
    $form->load_config_filestem("user/register");

    # et cetera...
}
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