Password Update

[doc55]

I'm trying to write a script that updates user's password based on the user's username, but I get it to work.
I need this script as part of another larger script integration, so it's not that people will be able to change everyone's password. I have multiple other security checks before I get to this script. The purpose of this portion is just to update the password without asking for the current user password.

Here is the script that I'm using

PHP Code:

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::getDbAssertor()->getRow( "user", array( "username" => $usernam ) );

$api = Api_InterfaceAbstract::instance();
$response = $api->callApi( 'user', 'save', array(
  'userid' => $vb_userinfo[ 'userid' ],
  'password' => $password,
  'user' => array(),
  'options' => array(),
  'adminoptions' => array(),
  'userfield' => array(),
) ); 


When I check

PHP Code:

var_dump($response); 


Here is what I get back:

PHP Code:

array(2) { ["errors"]=> array(1) { [0]=> array(1) { [0]=> string(13) "no_permission" } } ["userid"]=> string(1) "0" } 


I know there is a vB_DataManager_User that probably can be used, but I don't know how to use it or if it will be able to update the password.
I really appreciate if someone could help me figure this out.

Thanks