CI3 Api LoginController

LoginController.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class LoginController extends CI_Controller
{
	public function __construct()
	{
		parent::__construct();
		$this->load->library('api/AuthenticatesUsers', NULL, 'auth');
		$this->load->helper('api_response');
	}

	public function index()
	{
		$authenticate = $this->auth;

		if ($authenticate->login()) {
			response_with_json(
				200,
				'ok',
				$authenticate->getSuccessRespond(),
				'data'
			);
			return;
		}

		response_with_json(
			400,
			'bad request',
			$authenticate->getFailedRespond(),
			'error'
		);
	}
}