Create a Single Use Link to a Page

I want to create single use URLs for a page that I have embedded Calendly into. I don't want clients to be able to access the page and schedule meetings except for when I email the link. I understand that I can add a password to protect the page but as far as I can tell there isn't a way to make the passwords one time use either. I technically can just send them the one time links that Calendly generate, but I would prefer to keep it in Squarespace since I have important information that I would like to include on the scheduling page. It must be Calandly as my team already exclusively uses that system and do not want to migrate it to another service.