PHP Moip class autoloader

How do I make this require 'vendor / autoload.php', it does not come in the documentation.

 <?php
 require 'vendor/autoload.php';

 use Moip\Moip;
 use Moip\MoipBasicAuth;

 $endpoint = 'test.moip.com.br';
 $token = '01010101010101010101010101010101';
 $key = 'ABABABABABABABABABABABABABABABABABABABAB';

 $moip = new Moip(new MoipBasicAuth($token, $key), $endpoint);

 $customer = $moip->customers()->setOwnId('sandbox_v2_1401147277')
                          ->setFullname('Jose Silva')
                          ->setEmail('[email protected]')
                          ->setBirthDate('1988-12-30')
                          ->setTaxDocument('33333333333')
                          ->setPhone(11, 66778899)
                          ->addAddress('BILLING',
                                       'Avenida Faria Lima', 2927,
                                       'Itaim', 'Sao Paulo', 'SP',
                                       '01234000', 8);

 print_r($order = $moip->orders()->setOwnId('sandbox_v2_1401147277')
                    ->addItem('Pedido de testes Sandbox - 1401147277', 1, 'Mais info...', 10000)
                    ->setShippingAmount(100)
                    ->setCustomer($customer)
                    ->create());

Thank you.