Method login

/**
 * Login authentication function
 *
 * @param   array  $credentials  Array('username' => string, 'password' => string)
 * @param   array  $options      Array('remember' => boolean)
 *
 * @return  boolean  True on success.
 *
 * @since   3.2
 */
public function login($credentials, $options = array())
{
    // The minimum group
    $options['group'] = 'Public Backend';
    // Make sure users are not auto-registered
    $options['autoregister'] = false;
    // Set the application login entry point
    if (!\array_key_exists('entry_url', $options)) {
        $options['entry_url'] = Uri::base() . 'index.php?option=com_users&task=login';
    }
    // Set the access control action to check.
    $options['action'] = 'core.login.admin';
    $result = parent::login($credentials, $options);
    if (!$result instanceof \Exception) {
        $lang = $this->input->getCmd('lang', '');
        $lang = preg_replace('/[^A-Z-]/i', '', $lang);
        if ($lang) {
            $this->setUserState('application.lang', $lang);
        }
        static::purgeMessages();
    }
    return $result;
}