# Get the username and password from form
    my $username = $c->request->params->{username};
    my $password = $c->request->params->{password};

    # If the username and password values were found in form
    if ($username && $password) {
        # Attempt to log the user in
        if ($c->authenticate({ username => $username,
                               password => $password  } )) {
            # If successful, then let them use the application
            $c->response->redirect($c->uri_for(
                $c->controller('Books')->action_for('list')));
            return;
        } else {
            # Set an error message
            $c->stash(error_msg => "Bad username or password.");
        }
    } else {
        # Set an error message
        $c->stash(error_msg => "Empty username or password.")
            unless ($c->user_exists);
    }

    # If either of above don't work out, send to the login page
    $c->stash(template => 'login.tt2');