how to use aws-sdk-php v2.x with dynamodb session handling

test_sessions.php

<?php
 
// Include the SDK along with your other project dependencies
// using the Composer autoloader
require 'vendor/autoload.php';
use Aws\Common\Aws;
use Aws\Common\Enum\Region;
use Aws\DynamoDb\Exception\DynamoDbException;
$aws = Aws::factory(array(
    'key'    => 'aws_key_here',
    'secret' => 'my-secret-here',
    'region' => Region::US_EAST_1
));
$dynamodb = $aws->get('dynamodb');
 
$handler = $dynamodb->registerSessionHandler(array(
    'table_name' => 'my-sessions-table-name'
));
 
$handler->createSessionsTable(5,5);

this is intended to replace http://aws.typepad.com/aws/2012/04/scalable-session-handling-in-php-using-amazon-dynamodb.html
also relates to aws/aws-sdk-php#26