Creating a temporary login for clients

Hello everyone. I’m trying to create a temporary login for my clients. I need to create a login so that they can view their projects but I want them to be able to view it for no more than 24 hours. I need their projects to be private so that the clients are the only ones viewing their particular project. An example is I need client A to have a username and password (generated by me) to view their video project for 24 hours. After 24 hours their username and password should no longer work. Any ideas of plug ins that would work for this?