A user encountered the following error on a GCP project:
An error occurred: some backup storage locations are invalid: error getting backup store for location "default": rpc error: code = Unknown desc = invalid character '-' in numeric literal
This error was ambiguous and took some time to track down to the fact
that their credentials file wasn't a JSON file, but instead the contents
of the private key field. This change makes the problem slightly easier
to debug.
Signed-off-by: Nolan Brubaker <brubakern@vmware.com>