Function grpc_status

crates/openshell-server/src/multiplex.rs:1400–1404

(res: &Response<B>)

        }

        fn grpc_status<B>(res: &Response<B>) -> Option<String> {
            res.headers()
                .get("grpc-status")
                .map(|v| v.to_str().unwrap().to_string())
        }

        fn user_principal(subject: &str) -> Principal {
            Principal::User(UserPrincipal {