"missing required keys" - Ruby on Rails

i have the following Controller called Login:

class LoginController < ApplicationController
  skip_before_action :verify_authenticity_token
  protect_from_forgery
  before_action :require_user
  helper_method :current_user


  def current_user
    @current_user ||= User.find(session[:user_id]) if session[:user_id]
  rescue ActiveRecord::RecordNotFound
  end

  def require_user
    redirect_to login_path unless current_user
  end

  def show

  end

  def new
    if session[:user]
      @user = User.find(session[:user])
    end
  end


  def destroy
    reset_session
    redirect_to "/login/acesso", notice: "Você foi deslogado"
  end


  def create
    user = User.validate(login_params[:email], login_params[:senha])
    if user
      session[:user] = user.id
      redirect_to "/home/inicio", notice: "login feito com sucesso"
    else
      redirect_to "/login/acesso", notice: "Dados incorretos"
    end

  end
  private
  def login_params
    params.require(:login).permit(:email, :senha)
  end
end

and this is my routes:

Rails.application.routes.draw do

  root 'login#new'
  get '/home/inicio', to: 'home#index'

  scope '/login' do
    get '/acesso', to:'login#new'
    post '/acessorecebendo', to:'login#create'
    get '/sair', to:'login#destroy'
  end

  resources :login
  resources :home
  resources :produtos
  resources :fornecedors
end

and the error:

No route matches {:action=>"show", :controller=>"login"}, missing required keys: [:id]

at the lines:

def require_user redirect_to login_path unless current_user end

the point is: if i delete the line "before_action :..." found in Login controller, i got this error:

Couldn't find User with 'id'=2

so, to try solve this, i need to do a way to check if are someone logged or not and redirect to the proper view. I'm trying do something like that with this before action... can someone explain this to me, please? :\

i tried to follow this solutions: Couldn't find User with id=1

but didnt work..