set_userdata doesn't realy set userdata

Hi,

I'm using a modified version of the very basic user authentication library (https://github.com/joelvardy/Basic-CodeI...entication) for the authentication in my application.

It was working well until I did an upgrade to CI3 RC2, after that upgrade the userdata isn't set.

PHP Code:

$user_details = $user->row();
 
// Set the userdata for the current user
$this->ci->session->set_userdata(array(
'identifier' => $user_details->identifier,
'username' => $user_details->email,
'logged_in' => $_SERVER['REQUEST_TIME']
)); 


I use the database driver with the following configuration

PHP Code:

$config['sess_driver'] = 'database';
$config['sess_cookie_name'] = 'session';
$config['sess_expiration'] = 7200;
$config['sess_save_path'] = 'session'; //my sesion table
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 300; 


Does someone know what I am doing wrom?