SampleApp-Controller-Users_Create.pm

# create
post '/users' => sub {
    my $user = resultset('User')->new_result({});

    my $form = SampleApp::Form::User->new;
    $form->process(item => $user, params => { params });

    if ($form->validated) {
        sign_in $user;
        deferred success => 'Welcome to the Sample App!';
        redirect uri_for('/users/' . $user->id);
    } else {
        template 'users/new' => { form => $form };
    }
};