i think you missed forgot password section missing in your files. Please update if possible

Whenever I submit form, the database only adds a session and fails to add user. Every time I get

["__ci_last_regenerate"]=> int(session_no)

Whenever I try to change the index function in the User class to:

public function index() {

    $this->load->view('header');
    $this->load->view('user/profile');
    $this->load->view('footer');
}

It says It can't open the page, what am I doing wrong?

I am getting our on login and register page, can you please let know why this coming ?

C:\wamp\www\codeign\application\views\header.php:41:
array (size=1)
  '__ci_last_regenerate' => int 1479038928

how can i run some routes without passing by login?
Is it related to your module, or related to codeigniter and how can i do it.

Update:

I just found it in the router
if(!isset($_SESSION['username']) || !$_SESSION['logged_in']) redirect('login');

When user logs in session is created and but when navigating to another page session data is not available any more. I am confident the code is perfect, but what else can cause this issue?

Guys have you ever tried logging in using a different username with a password that is a password of another user? if you use your friends password when logging in, the account of your friend will login instead of your account.