Course objects accessible outside LMS paywall

Hi,

I'm trying to solve a simillar problem, but with a course placed on a website.

Situation client wants: A course will be placed on their website, but it will be accessible only for paying customers (it will be placed in a section, to which only paying customers can get). Once a paying customer opens the course by clicking on a button, the course opens in a new window. And now the tricky part - it shouldn't be possible to copy the URL to the course (so that it's not possible to share the course to someone, who hasn't paid for it).

Situation we're currently in: We've exported the course to Web format and sent it to administrators of the website (run on WordPress) to let them try if it works. They replied to us that there is a problem because of relative location of source files (CSS, JS) - they upload the contents of the course into a folder, try to run the course on the website but it doesn't work, because the HTML code looks for the source files in a different location. They want from us to change links of the source files so that they would lead to a folder they would create for it (which I honestly have no idea how to do). If we don't do that, the course could be accessible to nonpaying people, if they had URL.

My main question is - have you ever encountered such situation? And isn't there an easier way to ensure that the course, even with URL to it, will be accessible only of paying/logged in customers?

Thank you very much for your help!