The second way works. So we'll go with that.

config/routes.rb

@@ -5,7 +5,11 @@ Rails.application.routes.draw do
     resources :virtuals, only: [ :new, :create, :edit, :update, :destroy]
   end
 
-  devise_for :users, controllers: { registrations: "registrations" }
+ devise_for :users, :skip => [:registrations]
+  as :user do
+    get 'users/edit' => 'devise/registrations#edit', :as => 'edit_user_registration'
+    put 'users' => 'devise/registrations#update', :as => 'user_registration'
+  end
 
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html