controller login

<?php
    class home extends CI_Controller{
        function __construct(){
            parent::__construct();
            $this->load->model('pengguna_model');

        }

        // function index(){
        //     $this->load->view('home/login.php');
        // }

        function aksi_login(){
            $username = $this->input->post('pengguna');
            $password = $this->input->post('password');
            $where = array(
                'pengguna' => $username,
                'password' => md5($password)
                );
            $cek = $this->pengguna_model->cek_login("pengguna",$where)->num_rows();
            if($cek > 0){

                $data_session = array(
                    'pengguna' => $username,
                    'password' => md5($password)
                    );

                $this->session->set_userdata($data_session);

                redirect('dashboard');

            }else{
                echo "Username dan password salah !";
            }
        }

        function logout(){
            $this->session->sess_destroy();
            rredirect('depan/login');
        }

    }
?>