Devise Couldn't find User with id=sign_in

I have added routes for devise and users in this manner

AppName::Application.routes.draw do resources :users devise_for :users

and i am getting error like"Couldn't find User with id=sign_in" while trying to login application. I changed the order in routes.rb file then it works

AppName::Application.routes.draw do devise_for :users resources :users