I know I am late to the party, but I concur that dealing with authentication is 90% of the hurdle. I've had do all kinds of things like examine Python code before - not that it's easy to tease out. The general things you need tend to be the same like, MIME::Base64 and Digest::SHA, but the way they want you to combine strings (keys, usernames, password) and the headers they want you to provide are always a crap shoot.

I am not going to post the code because idk if it's correct and it seems wrong to do in the monastery, but chatgpt seems to be happy suggesting a Perl solution for this. If you make some progress and have questions, please report back.

update: this is awkward, I was gone so long I forgot I had replied to this and didn't even notice. hopefully the additional info is helpful