Set Google API to update datafeed in Google Merchant

I need to use this api:
https://github.com/googleapis/google-api-php-client

with these php files:
https://github.com/googleads/googleads-shopping-samples/blob/main/php/DatafeedsSample.php
https://github.com/googleads/googleads-shopping-samples/blob/main/php/BaseSample.php

to update datafeed in google merchant using api (zip file attached to check the scope).