@Override
public boolean equals(Object obj) {
	if (this == obj)
		return true;
	if (obj == null)
		return false;
	if (getClass() != obj.getClass())
		return false;
	User other = (User) obj;
	if (userData == null) {
		if (other.userData != null)
			return false;
	} else if (!userData.equals(other.userData))
		return false;
	return true;
}