public void createNewPerson(Person person, String name, String email, String contactNumber, String address, int accessLevel, String password, String vatNumber, String contactName ){
		if (person instanceof Customer){
			customerList.add( new Customer(name, email, contactNumber, address));
		}
		else if(person instanceof Staff){
			staffList.add(new Staff(name, email, contactNumber, address, password, accessLevel));
		}
		else{
			supplierList.add(new Supplier(name, email, contactNumber, address, contactName, vatNumber));
		}
	}