result = (id != null ? id.hashCode() : 0);
result = (int) (id ^ (id >>> 32));
    public int hashCode() {        int result;        result = (id != null ? id.hashCode() : 0);        result = 29 * result + (username != null ? username.hashCode() : 0);        result = 29 * result + (devices != null ? devices.hashCode() : 0);        return result;    }