🐛 Fixed missing member email on unsubscribe page
🐛 Fixed missing member email on unsubscribe page

no refs

- The `update` method in members-api package was edited to return Model object instead of JSON directly - TryGhost/Members@a28bcc5
- This unsubscribe handler was returning the raw member object returned from `update` method, which is now a model object and not able to access `member.email`
- Fix updates the unsubscribe request handler to return the member JSON again

bitjson/Ghost,janvt/Ghost,e10/Ghost,ErisDS/Ghost,ErisDS/Ghost,janvt/Ghost,TryGhost/Ghost,TryGhost/Ghost,ErisDS/Ghost,TryGhost/Ghost,bitjson/Ghost,e10/Ghost