[doc55]

After reading the vB API documentation, it looks like the acnt_setting should be set to 1.
So, I changed the code as you advised and I'm getting the userid from vB fetchUserinfo instead of cookies.

However, my code still not working. It is not updating the username. Also it is not verifying the current password.
What am I missing?

PHP Code:

//init the vBulletin system
require_once( '/forum/core/vb/vb.php' );
vB::init();
define( "CSRF_PROTECTION", false );
require_once( '/forum/includes/vb5/autoloader.php' );
vB5_Autoloader::register( '/forum' );
vB5_Frontend_Application::init( 'config.php' );
$vb_userInfo = vB_Api::instance( 'user' )->fetchUserinfo();

//get user info
$vb_userid = $vb_userInfo[ 'userid' ];
$current_password = $_POST[ 'form' ][ 'current_password' ];
$new_password = $_POST[ 'form' ][ 'new_password' ];
$email = $_POST[ 'form' ][ 'email' ];
$username = $_POST[ 'form' ][ 'username' ];

//Update user information
$api = Api_InterfaceAbstract::instance();
$response = $api->callApi( 'user', 'save', array(
  'userid' => $vb_userid,
  'password' => '',
  'user' => array( 'email' => $email, 'username' => $username ),
  'options' => array(),
  'adminoptions' => array(),
  'userfield' => array(),
  'notificationOptions' => array(),
  'hvinput' => array(),
  'extra' => array(
    'password' => $current_password,
    'newpass' => $new_password,
    'email' => $email, 
    'username' => $username,
    'acnt_setting' => 1
  ),
) );
vB::getDbAssertor()->update( 'user', array( 'username' => $username ), array( "userid" => $vb_userid ) ); 


I appreciate any feedback.