$pbk_crypt = Crypt::PBKDF2->new(
                hash_class => 'HMACSHA2',
                hash_args => {
                        sha_size => 512,
                },
                iterations => 10000,
                salt_len => 10,
        );

        $pass = $pbk_crypt->generate('password');
 
##</code><code>##

__PACKAGE__->config(
    'Plugin::Authentication' => {
        default => {
            class                    => 'SimpleDB',
            user_model          => 'DB::User',
            password_type   => 'self_check',
        },
)

##</code><code>##

__PACKAGE__->add_columns(
    'password' => {
        passphrase       => 'rfc2307',
        passphrase_class => 'SaltedDigest',
        passphrase_args  => {
            algorithm   => 'SHA-512',
            salt_random => 10,
            iterations => 10000,
        },
        passphrase_check_method => 'check_password',
    },
); 

##</code><code>##

 if ($username and $password) {
    if ($c->authenticate({ username => $username,
                               password => $password  } )) {
            
            $c->response->redirect($c->uri_for_action('/profile'));
            return;
        } else {
            # Set an error message
            $c->stash(error_msg => "Bad username or password.");
        }
}