webapi – Magento2.2.5 Access to the Magento log file for the Web API

We use Magento api to update our warehouse system when we receive orders and then re-update Magento with inventory updates from our warehouse system. However, we recently had an order that indicated the following error and we are not sure how or where the API error log can be accessed.

"Internal error. Details are available in the Magento log file." Report ID: webapi-5c644d10f0e26 "

I checked both var / log and var / report and I do not see any API folders or log files whose API refers to the name.

I have magento 2.2.5