r - How to authenticate with service account and bigrquery package?

Question

I have been able to authenticate using the json file associated with a service account using googleAuth and bigQueryR.

# Load Packages
global.packages <- c("bigQueryR", "googleAuthR")

### Apply require on the list of packages; load them quietly
lapply(global.packages, require, character.only = TRUE, quietly = TRUE)

Sys.setenv("GCS_AUTH_FILE" = "json_file_location")

#Authenticate Google BQ
googleAuthR::gar_attach_auto_auth("https://www.googleapis.com/auth/bigquery",
                                  environment_var = "GCS_AUTH_FILE")

This works and I am able to start using functions from bigQueryR.

Now assume I am limited to the bigrquery package, how can I authenticate using a service account with this package?

I have looked at the documentation here to no avail: https://cran.r-project.org/web/packages/bigrquery/bigrquery.pdf

The resources I have come across on the internet propose using the bigQueryR package in place of bigrquery.

For instance this related stackoverflow question: Use bigrquery auth in shiny application.

But I need functions only available in bigrquery.

Answer 1

Waitting for answers