public String signup() {
		if (!password.equals(confirmPassword)) {
			addActionError(getText("error.signup_password"));
			return ERROR;
		}
		User user = DataProvider.createUser(name, username, password);
		if (user == null){
			addActionError(getText("error.signup_exists"));
			return ERROR;
		}
		session.put(USER_OBJ, user);
		return SUCCESS;
	}