How to pull data from invoicing.co

Hi,
I tried to use package https://github.com/invoiceninja/sdk-php but looks like didn’t work. I do not see any model which is mention in this package documentation.
I tried to use Postman and laravel guzzle client with custom header (X-Ninja-Token) with the token that I generate on invoicing.co but get the error “Invalid token”. Can anybody show me direction where and how to start? I am totally confused here.

Hi,

You need to use the main branch for v5