docs: def isMember(userid, password, group):
      """Test to see if the given userid/password combo is an authenticated member of group.
  
      userid: CADC Username (str)
      password: CADC Password (str)
      group: CADC GMS group (str)
      
      """
      try:
          certfile = getCert(userid, password)
  
          group_url = getGroupsURL(certfile, group)
          logging.debug("group url: %s" % ( group_url))
  
          con = httplib.HTTPSConnection(_SERVER,
                                        443,
                                        key_file=certfile.name,
                                        cert_file=certfile.name,
                                        timeout=600)
  
          con.connect()
          con.request("GET", group_url)
          resp = con.getresponse()
          if resp.status == 200:
              return True
      except Exception as e:
          logging.error(str(e))
  
      #logging.debug(str(resp.status))
  
      return False