You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: users_controller.rb
    path of file: ./repos/barcelona/app/controllers
    
    the code of the file until where you have to start completion: class UsersController < ApplicationController
  skip_before_action :authenticate, :authorize_action, only: [:login]
  before_action :load_user, exce
    
  def login
    user = auth_backend.login
    raise ExceptionHandler::Unauthorized.new("You are not allowed to login") if user.nil?

    user.save!

    Event.new.notify(message: "#{user.name} has logged in to Barcelona")

    render json: user
  end