grpc client example

Example gRPC client using IAP authentication.

Description

The client here is based on the gRPC Go examples. It uses oauth credentials to authenticate with the Identity Aware Proxy on every gRPC call.

Note: gRPC oauth2 authentication requires TLS.

The client-id is the oauth client_id in the credentials associated with your IAP configuration. See https://cloud.google.com/iap/docs/authentication-howto#authenticating_from_a_service_account