Returns 200 if `err` is `nil`.

Runs the gcloud command to get the access token that it uses and makes a connection that uses that for auth to GCP services.

Runs the gcloud command to get the project name that gcloud will connect to by default.

Uses DefaultClient() (from golang.org/x/oauth2/google) to obtain authentication for GCP services.

Calls GoogleClient() but, if that fails, it reports the error and exits.