dip_1.rb

class UsersController < ApplicationController
  # ...
  before_action :auth_user

  # ...

  def show
    @user = User.find(params[:id])
    @customers_portals = UserCustomersPortalsQuery.new(@user).all
  end

  private
  
  def auth_user
    return true if current_user.present?

    redirect_to AuthService.sso_url({
      callback_url: new_session_url,
      original_url: safe_url
    })
  end

  # ...
end