Slowly getting there.

config/routes.rb

@@ -6,8 +6,12 @@ Rails.application.routes.draw do
       resources :cafs
   end
 
+  authenticated :user do
+    root to: 'home#index', as: :authenticated_root
+  end
+
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 
   # Defines the root path route ("/")
-  root "home#index"
+  root to: redirect('/users/sign_in')
 end