Adding subscriptions page to access to a shiny app tab

I have developed a shiny app and I would like to put it into production. Through a tab, users could access information that I want to restrict to subscribers. By navigating to that tab, users would access a payment processor to sign up. Once the user has subscribed, he could access the content of the tab through username and password. I have seen that stripe offers a subscription service. An example would be the following:

I would like to know how I could do something similar.