That’d likely just be the equivalent of getting the “time machine” message, though, right? It wouldn’t be as accurate as what you can see on that passport logins page? As far as I understand, that page shows if a username is currently available to be used, right?
Is it worth trying to go through the effort of mimicking the requests on that form, or is there some mechanism there that prevents that? I’m poking at it right now and am getting some “failed to decode JSON” error.
I guess worst case scenario I could load the page up in a headless browser?