code: def two_factor_login(self, two_factor_code):
          
          if not self.two_factor_auth_pending:
              raise InvalidArgumentException("No two-factor authentication pending.")
          (session, user, two_factor_id) = self.two_factor_auth_pending
  
          login = session.post('https://www.instagram.com/accounts/login/ajax/two_factor/',
                               data={'username': user, 'verificationCode': two_factor_code, 'identifier': two_factor_id},
                               allow_redirects=True)
          resp_json = login.json()
          if resp_json['status'] != 'ok':
              if 'message' in resp_json:
                  raise BadCredentialsException("Login error: {}".format(resp_json['message']))
              else:
                  raise BadCredentialsException("Login error: \"{}\" status.".format(resp_json['status']))
          session.headers.update({'X-CSRFToken': login.cookies['csrftoken']})
          self._session = session
          self.username = user
          self.two_factor_auth_pending = None
docs: Second step of login if 2FA is enabled.
          Not meant to be used directly, use :meth:`Instaloader.two_factor_login`.
  
          :raises InvalidArgumentException: No two-factor authentication pending.
          :raises BadCredentialsException: 2FA verification code invalid.
  
          .. versionadded:: 4.2