Change default routes Devise Rails

I have this routes.rb:

  devise_for :users, :path => '', path_names: 
                          { sign_in: "login", sign_out: "logout", sign_up: "registration"}

I changed sign_in and sign_up routes and if you go to sign_up you will get 404 error, instead /registration will work. What I want is to change and another routes like forgotten password in the same way. If I type in the console rake routes, I see this for forgotten password:

new_user_password GET /password/new(.:format) devise/passwords#new

How can I do that, but and make default route to not work, just the new one?