public function on_user_sign_in($pars)
{
try {
$user = new AmyUser($this->configuration);
$user->authorize($pars['username'], $pars['password'], 'amy');
$user->create_session();
self::setResult($user);
} catch (Exception $e) {
self::raiseError('Unable to login: ' . $e->getMessage());
}
}