code: def AuthenticateSessionId(self, username, password):
          
          self.__setAuthenticationMethod__('authenticating_session_id')
  
          parameters = {'username':username, 'password':password}
  
          if self.__SenseApiCall__("/login.json", "POST", parameters = parameters):
              try:
                  response = json.loads(self.__response__)
              except:
                  self.__setAuthenticationMethod__('not_authenticated')
                  self.__error__ = "notjson"
                  return False
              try:
                  self.__session_id__ = response['session_id']
                  self.__setAuthenticationMethod__('session_id')
                  return True
              except:
                  self.__setAuthenticationMethod__('not_authenticated')
                  self.__error__ = "no session_id"
                  return False
          else:
              self.__setAuthenticationMethod__('not_authenticated')
              self.__error__ = "api call unsuccessful"
              return False
docs: Authenticate using a username and password. 
              The SenseApi object will store the obtained session_id internally until a call to LogoutSessionId is performed.
              
              @param username (string) - CommonSense username
              @param password (string) - MD5Hash of CommonSense password
              
              @return (bool) - Boolean indicating whether AuthenticateSessionId was successful