return
	}

	var sp *policy.Policy
	if len(updateReq.NewPolicy) > 0 {
		sp, err = policy.ParseConfig(bytes.NewReader(updateReq.NewPolicy))
		if err != nil {
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
			return
		}
		if sp.Version == "" && len(sp.Statements) == 0 {
			sp = nil
		}
	}
	opts := updateServiceAccountOpts{