I need to develope a system, where by at the start of every month, an email is sent out to every client. In that email, will exist a unique URL. The client can click on the link and go straight to a grid tool that we already have partly developed (allowing them to manipulate tracked data etc). At the end of the month, the link will no longer work and a new email will be sent. The idea is to not have the user enter a password or username, ever.
I am sure this is possible in ASP.NET. But I don't know how, 'exactly', hence asking here. I wonder if anyone has any examples of something like this already in action or some advice on how to go about developing this.
Thanks for any assistance.