Method setCredentials

/**
 * Method to set client login credentials
 *
 * @param   string  $client  Client name, currently only 'ftp' is supported
 * @param   string  $user    Username
 * @param   string  $pass    Password
 *
 * @return  boolean  True if the given login credentials have been set and are valid
 *
 * @since   1.7.0
 */
public static function setCredentials($client, $user, $pass)
{
    $return = false;
    $client = strtolower($client);
    // Test if the given credentials are valid
    switch ($client) {
        case 'ftp':
            $app = Factory::getApplication();
            $options = array('enabled' => $app->get('ftp_enable'), 'host' => $app->get('ftp_host'), 'port' => $app->get('ftp_port'));
            if ($options['enabled']) {
                $ftp = FtpClient::getInstance($options['host'], $options['port']);
                // Test the connection and try to log in
                if ($ftp->isConnected()) {
                    if ($ftp->login($user, $pass)) {
                        $return = true;
                    }
                    $ftp->quit();
                }
            }
            break;
        default:
            break;
    }
    if ($return) {
        // Save valid credentials to the session
        $session = Factory::getSession();
        $session->set($client . '.user', $user, 'JClientHelper');
        $session->set($client . '.pass', $pass, 'JClientHelper');
        // Force re-creation of the data saved within JClientHelper::getCredentials()
        self::getCredentials($client, true);
    }
    return $return;
}