about the doc

[mikecastrodemaria]

see sample in action
cd samples
php ./genericGetter.php

In my case it produce =>

Warning: require_once(/....../SellerCenterSDK-PHP-master/samples/../vendor/autoload.php): failed to open stream: No such file or directory in /...../SellerCenterSDK-PHP-master/samples/genericGetter.php on line 8

Fatal error: require_once(): Failed opening required '/...../SellerCenterSDK-PHP-master/samples/../vendor/autoload.php' (include_path='.:') in /...../SellerCenterSDK-PHP-master/samples/genericGetter.php on line 8

There is no "../vendor/autoload.php" existing from the archive.

[mikecastrodemaria]

sorry, jump the section 1 : To use the sdk code, use Composer's autoload

[mikecastrodemaria]

anyway, it will be better to point out to the composer install tut.

[mikecastrodemaria]

$ composer require rocket-labs/sellercenter-sdk-php

Using version 20170331 for rocket-labs/sellercenter-sdk-php
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)

Your requirements could not be resolved to an installable set of packages.

Problem 1
- The requested package rocket-labs/sellercenter-sdk-php No version set (parsed as 1.0.0) is satisfiable by rocket-labs/sellercenter-sdk-php[No version set (parsed as 1.0.0)] but these conflict with your requirements or minimum-stability.

Installation failed, reverting ./composer.json to its original content.