Customer managing subscription products - 7.0

Site URL: http://islandcoffeenz.com

Dear squarespace brains,
My issue: my customer is selling coffee online and has commerce set up and rolling. We have now added a Subscription product for a weekly coffee delivery (and want to add bi-weekly and monthly options). I don't see how to add an account management button to the top level navigation, and in fact no way for the customer or store to manage their subscription based products, what am I missing? 

Site was created in 7.0 Brine template, so ideally hoping for a work around within that, prefer not to have to rebuild the site  in newer version, but very important that customers can manage their subscription products and pause/cancel.

thank you so much

kindest

Vibeke