"countdown api tfl gov uk" and switch to HTTPS

TfL have recently changed the feed we consume from HTTP to HTTPS only.

Prior to this change we were successfully consuming data using HTTP.

To handle the switch to HTTPS we have updated our service and have successfully tested this against “countdown-cf-test.tfl.gov.uk” using our original credentials.

The issue is that when we attempt to consuming data using HTTPS from “countdown.api.tfl.gov.uk” with the original credentials it fails.

Can I please verify the Live TfL URL we should be using and whether our existing credentials (pre switch to HTTPS) should continue to work.