This project is made with 3 classes that are Account, Main menu and ATM.
-> Account : Made for Account details like a/c balance,credit,debit option.
-> Main menu : Made for optional interface what we see on any atm machine screen like checking balance, withdraw and debit money.
-> ATM : This is super class of Main menu for login option.

Future plane : 1. Make fronted part with xml and kotlin. 2. Connecting to database for user and his account details.