return Error{
		Code:    http.StatusInternalServerError,
		APICode: "kms:KeyDeletionFailed",
		Err:     "failed to delete KMS key",
		Cause:   err,
	}
}

func errListingKeysFailed(err error) Error {
	return Error{
		Code:    http.StatusInternalServerError,
		APICode: "kms:KeyListingFailed",
		Err:     "failed to list keys at the KMS",
		Cause:   err,
	}
}

	resp, err := c.client.ListKeys(ctx, &kms.ListRequest{
		Enclave:    c.enclave,
		Prefix:     req.Prefix,
		ContinueAt: req.ContinueAt,
		Limit:      req.Limit,
	})
	if err != nil {
		return nil, "", errListingKeysFailed(err)
	}

	names := make([]string, 0, len(resp.Items))
	for _, item := range resp.Items {
		names = append(names, item.Name)
	}
	return names, resp.ContinueAt, nil
}