Error with undefined method `before_action'

Routing Error 
undefined method `before_action' for UsersController: Class

Rails.root: /Users/TOMOAKI/photolog

Application Trace | Framework Trace | Full Trace app/controllers/users_controller.rb:2:in<class:UsersController>' 

app/controllers/users_controller.rb:1:in<top(required)>'Routes

Routes match priority from top to bottom

Helper HTTP Verb Path Controller # Action Path/Url Path Match

comments_path GET/comments(.:format) comments#index 
                POST/comments(.:format) comments#create 
new_comment_path GET/comments/new(.:format)comments#new 
edit_comment_path GET/comments/:id/edit(.:format)comments#edit 
comment_path GET/comments/:id(.:format)comments#show 
                PATCH/comments/:id(.:format) comments# update 
                PUT/comments/:id(.:format)comments#update 
                DELETE/comments/:id(.:format)comments#destroy 
new_user_session_path GET/users/sign_in(.:format)device/sessions#new 
user_session_path POST/users/sign_in(.:format)device/sessions#create 
destroy_user_session_path DELETE/users/sign_out(.:format)device/sessions#destroy 
user_omniauth_authorize_path GET|
                POST/users/auth/:provider(.:format) users/omniauth_callbacks #pasthru {:provider=>/twitter|facebook/} 
user_omniauth_callback_path GET|
                POST/users/auth/:action/callback(.:format)users/omniauth_callbacks#(?-mix:twitter|facebook) 
user_password_path POST/users/password(.:format)device/passwords#create 
new_user_password_path GET/users/password/new(.:format)device/passwords#new 
edit_user_password_pathGET/users/password/edit(.:format)device/passwords#edit 
                PATCH/users/password(.:format) device/passwords# update 
                PUT/users/password(.:format) device/passwords# update 
cancel_user_registration_path GET/users/cancel(.:format)device/registrations#cancel 
user_registration_path POST/users(.:format)device/registrations#create 
new_user_registration_path GET/users/sign_up(.:format)device/registrations#new 
edit_user_registration_path GET/users/edit(.:format)device/registrations#edit 
                PATCH/users(.:format)device/registrations# update 
                PUT/users(.:format)device/registrations# update 
                DELETE/users(.:format)device/registrations#destroy 
root_path GET/redirect(301,/photos) 
photos_path GET/photos(.:format)photos#index 
                POST/photos(.:format)photos#create 
new_photo_path GET/photos/new(.:format)photos#new 
edit_photo_path GET/photos/:id/edit(.:format)photos#edit 
photo_path GET/photos/:id(.:format)photos#show 
                PATCH /photos /:id(.:format)photos# update 
                PUT/photos/:id(.:format)photos#update 
                DELETE /photos /:id(.:format)photos#destroy 
retire_user_path GET/user/retire(.:format)users#retire 
user_path POST/user(.:format)users#create 
new_user_path GET/user/new(.:format)users#new 
edit_user_path GET/user/edit(.:format)users#edit 
                GET/user(.:format)users#show 
                PATCH/user(.:format)users#update 
                PUT/user(.:format)users#update 
                DELETE/user(.:format)users#destroy

None Toggle session dump Toggle env dump Response

None

class UsersController<ApplicationController
 before_action —Authenticate

  defretire
  end

  def destroy
    if current_user.destroy
      reset_session
      redirect_to root_path, notice: 'Departure completed'
    else
      render —retire
    end    
  end
end

Rails.application.routes.drawdo
  resources:comments
  device_for:users,controllers:{omniauth_callbacks:'users/omniauth_callbacks'}
  root to : redirect('/photos')
  resources —photos
  resource —user do
    get 'retire'
  end

  # The priority is based upon order of creation: first created->highest priority.
  # See how all your routes lay out with "rake routes".

  # You can have the root of your site routed with "root"
  # root 'welcome #index'

  # Example of regular route:
  #   get'products/:id'=>'catalog#view'

  # Example of named route that can be invoked with purchase_url (id: product.id)
  #   get'products/:id/purchase'=>'catalog#purchase', as::purchase

  # Example resource route (maps HTTP verbs to controller actions automatically):
  #   resources:products

  # Example resource route with options:
  #   resources —products do
  #     member do
  #       get 'short'
  #       post 'toggle'
  #     end
  #
  #     collection do
  #       get'sold'
  #     end
  #   end

  # Example resource route with sub-resources:
  #   resources —products do
  #     resources:comments,:sales
  #     resource —seller
  #   end

  # Example resource route with more complex sub-resources:
  #   resources —products do
  #     resources:comments
  #     resources —sales do
  #       get 'recent', on: —collection
  #     end
  #   end

  # Example resource route with concerns:
  #   concern —toggleable do
  #     post 'toggle'
  #   end
  #   resources:posts,concerns::toggleable
  #   resources:photos, concerns: —toggleable

  # Example resource route with in anamespace:
  #   namespace —admin do
  #     # Directs/admin/products/* to Admin:: ProductsController
  #     #(app/controllers/admin/products_controller.rb)
  #     resources:products
  #   end
end

class User<ActiveRecord::Base
  # Include default device modules.Others available are:
  # :confirmable, :lockable, :timeoutable and :mniauthable
  device:database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable, :omniauthable
         has_many:photos,dependent::nullify
         has_many:comments,dependent::nullify


         def self.find_or_create_from_oauth(auth)
         User.find_or_create_by(provider:auth.provider, uid:auth.uid)do | user|
         user.user_name=auth.info.nickname||auth.info.name
         user.avatar_url=auth.info.image
         user.email=User.dummy_email(auth)
         user.password=Device.friendly_token [0,20]
    end
  end

  private

  def self.dummy_email(auth)
    "#{auth.uid}-#{auth.provider}@e-xample.com"
  end

end