change auth server

def main():

    logging.info('Program started.')

    try:

        os.chdir(os.path.dirname(sys.argv[0]))  # To read config in the same directory

    except OSError:

        pass

    logging.info('Reading configurations...')

    global config

    config = load_config()

    times_retry_login = config['max_times_retry_login']

    test_url = config['captive_portal_server'] + '/generate_204'

        logging.info('Checking network status...')

        try:

            login = requests.Session()

            test = login.get(test_url)

            test = login.get(test_url, timeout=30)

        except:

            logging.info('Connection FAILED. Try again in ' + str(config['interval_retry_connection']) + ' sec.')

            sleep(config['interval_retry_connection'])

            logging.info('Login information acquired.')

            url = 'http://weblogin.sustc.edu.cn{}'.format(action)

            url = 'http://cas.sustc.edu.cn{}'.format(action)

            h = {'Host': 'weblogin.sustc.edu.cn', 'Connection': 'keep-alive', 'Cache-Control': 'max-age=0',

            h = {

                'Host': 'cas.sustc.edu.cn',

                'Connection': 'keep-alive',

                'Cache-Control': 'max-age=0',

                'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',

                 'Origin': 'http://weblogin.sustc.edu.cn', 'Upgrade-Insecure-Requests': '1',

                'Origin': 'http://cas.sustc.edu.cn',

                'Upgrade-Insecure-Requests': '1',

                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36',

                 'Content-Type': 'application/x-www-form-urlencoded', 'DNT': '1', 'Referer': url,

                 'Accept-Encoding': 'gzip, deflate', 'Accept-Language': 'en-US,en;q=0.8,zh-CN;q=0.6,zh;q=0.4'}

                'Content-Type': 'application/x-www-form-urlencoded',

                'DNT': '1',

                'Referer': url,

                'Accept-Encoding': 'gzip, deflate', 'Accept-Language': 'en-US,en;q=0.8,zh-CN;q=0.6,zh;q=0.4'

            }

            logging.info('Login as ' + config['username'])

            r = login.post(url, data=info, headers=h)

            r = login.post(url, data=info, headers=h, timeout=30)

            logging.info('Login information posted to the CAS server.')

            soup_response = BeautifulSoup(r.content, 'html5lib')