Can I use Go if I already have ClassPass? Kate Updated December 05, 2018 21:16 Yes! If you already have a ClassPass account, please use the same login credentials for Go. Just download the Go app and you’ll see the option to login. Related articles How many classes can I take per month? Can I use Go without purchasing or being a member of ClassPass? What is the cost of Go? What is Go? What is ClassPass?