How to use this library with a Service Account (Json based)

[sabbadino]

Hi, I need to implement a server based printing on GCP.
The reccomended way for server to server authentication seems to be Service Accounts (using the Json format). I managed to get a valid token using the official google auth nuget package.
However it's not clear if it's possible to use the GoogleCloudPrintClient. with the token obtaned in this way (service accounts does not have client id or secrets).
Any suggestion will be appreciated
Enrico Sabbadin