Spark routes on subdomain

Hi,

Just a quick question is it possible to move all the spark vendor pages over to dashboard.example.com So if a user is logged in it will push them there and if not it displays the welcome page.

I can use the subdomain routing group for the spark routes but I'm unsure how to redirect people to dashboard.example.com on login or if they are already logged in.

e.g. I want the Spark settings/login pages to be dashboard.example.com/login

Thanks!