Piwik\Plugins\CoreHome\Columns\UserId::onExistingVisit PHP Method

public onExistingVisit ( Request $request, Piwik\Tracker\Visitor $visitor, Action \| null $action ) : mixed \| false
$request	Piwik\Tracker\Request
$visitor	Piwik\Tracker\Visitor
$action	Piwik\Tracker\Action \| null
return	mixed \| false

    public function onExistingVisit(Request $request, Visitor $visitor, $action)
    {
        return $request->getForcedUserId();
    }

UserId