How to use the logentries.le.Domain.MAIN function in Logentries

def retrieve_account_key():
    """
    Retrieves account keys from the web server.
    """
    while True:
        try:
            username = raw_input('Email: ')
            password = getpass.getpass()
            c = domain_connect(config, Domain.MAIN, Domain)
            c.request('POST', ACCOUNT_KEYS_API,
                      urllib.urlencode({'username': username, 'password': password}),
                      {
                          'Referer': 'https://logentries.com/login/',
                          'Content-type': 'application/x-www-form-urlencoded',
                      })
            response = c.getresponse()
            if not response or response.status != 200:
                resp_val = 'err'
                if response:
                    resp_val = response.status
                if resp_val == 403:
                    print >> sys.stderr, 'Error: Login failed. Invalid credentials.'
                else:
                    print >> sys.stderr, 'Error: Unexpected login response from logentries (%s).' % resp_val
            else: