controller de users no devise

control_users_controller

class ControlUsersController < ApplicationController
  before_action :authenticate_user!
  before_action :set_user, only: [:show, :edit, :update, :destroy]

  def index
  	@users = User.all
  	authorize @users
  end

  def show
  end

  def new
  	@user = User.new
  	authorize @user
  end

  def edit
  end

  def create
  	@user = User.new(user_params)
  	authorize @user

  	respond_to do |format|
  	  if @user.save
  	  	format.html { redirect_to @user, notice: "Usuário salvo com sucesso!"}
  	  else
  	  	format.html { render :new}
  	  end
  	end
  end

  def update
  	respond_to do |format|
  		if @user.update(user_params)
  			format.html { redirect_to @user, notice: "Usuário atualizado com sucesso!"}
  		else
  			format.html { render :edit}
  		end
  	end
  end

  def destroy
  	@user.destroy
  	  respond_to do |format|
  	  	format.html { redirect_to user_url, notice: "Usuário deletado com sucesso!"}
  	  end
  end

  private

  def set_user
  	@user = User.find(params[:id])
  	authorize @user
  end

  def user_params
  	params.equire(:user).permit(:email, :role)
  end

end

Routes.rb

Rails.application.routes.draw do
  get 'control_users/index'

  get 'control_users/index'
  get 'control_users/new'

  root 'welcome#index'

  get 'welcome/index'

  devise_for :users

  resources :funs
  #get 'series' => 'funs#index'

  resources :movies
  #get 'filmes' => 'movies#index'

  resources :control_users

end

User_policy

class UserPolicy < ApplicationPolicy

  def index?
  	user.admin?
  end

  def new
    user.admin?
  end

  def create?
    user.admin?
  end

  def update?
    user.admin?
  end

  def destroy?
    user.admin?
  end


  class Scope < Scope
    def resolve
      scope
    end
  end
end