3-Year User Account Subscription Length

My client wants to offer a 3-year subscription term for video curriculum, but the User Accounts / Subscription documentation doesn’t mention any term longer than a single year. If this is the case, does anyone know of a workaround (automatic or perhaps admin controlled) that would enable the subscription to remain active without additional payment for years 2 and 3? Nothing has been built in Webflow yet so there’s no read-only link. I appreciate any input reading my inquiry, thank you.