Ruby / Rails :: routes for api only

RoutesForApiOnly1.rb

namespace :api, :defaults => { :format => :json } do
  namespace :v1 do

    resources :shots
#     get 'cocktails/categories',           to: 'cocktails#categories'
    # namespace :cocktails do
    # end
  end
end
devise_for :users,
           controllers: {
             sessions: 'users/sessions',
             registrations: 'users/registrations'
           }