title: Cancel paypal recuring payments with ExpressCheckout
body: <p>I'm creating an website where you have to pay 1 dollar/month to use an account. Ok, it is working, but the person who uses it can access paypal website and cancel the recurring payment, but still use the account. 
  How can I solve it?
  The codes that I'm using: <a href="https://github.com/hrendoh/PayPal-Recurring-Payment-example" rel="nofollow">https://github.com/hrendoh/PayPal-Recurring-Payment-example</a></p>