Create an allow list (white list) of IP addresses that SKY API requests would come from or allow use of a specific / custom header for all requests.

We are very hesitant about opening up our production environment URL to the internet. Currently we restrict access via IP addresses and networks. If we had to open up access and not restrict via IP address from Sky Api, we would like to be able to restrict access by checking for a custom header and value that would be sent from Sky API.