How Does A Customer Cancel Their Recurring Profile (Subscription)

Hey everyone, probably a silly question, but actually never had the issue come up...Can somebody save me the hassle of signing up for recurring profile and let me know how a customer goes about cancelling an existing recurring profile? Can they do it from their My Account in Opencart? I am guessing, yes. But just wondering if someone could explain to me the process, so I know?

Thank you so much for any help you can give.

I have made 3 minutes research: apparently only in Paypal. The payment gateway is the ONLY way that customer can cancel. NOT very customer friendly.