Need to download tickets for users from Zendesk?

Question

RESTful API

I need to upload tickets opened for a specific user via Rest api zendesk
Tried to connect this
but after unpacking I get
Warning: include(vendor/autoload.php): failed to open stream: No such file or directory in C:\xampp\htdocs\zendesk\ index.php on line 2
Warning: include(): Failed opening 'vendor/autoload.php' for inclusion (include_path='.;C:\xampp\php\PEAR') in C:\xampp\htdocs\zendesk\index .php on line 2
Fatal error: Class 'Zendesk\API\Client' not found in C:\xampp\htdocs\zendesk\index.php on line 11
Maybe I approached this the wrong way? Tell