public boolean addOneUser(String name, String password, double money) {
		if (this.dVDMainDateArrayList != null) {
			// 
			for (User a : this.usersMainDateArrayList) {
				if (a.getName().equals(name)) {
					return false;
				}
			}
			usersMainDateArrayList.add(new User(name, password, money, this.dVDMainDateArrayList));
			return true;
		} else {
			return false;
		}
	}