38. Password Protected Locker System

Design a password-protected locker system using an Arduino. The system has two types of passwords

1. Master Pin (Reset User Pin )
2. User Pin (Access Locker)

The system will ask for a “User PIN” during the first-time setup. Both PINs will be used as below:

1. Enter the User PIN to access the locker.
2. Update PIN after the current user PIN verification.
3. Reset the User PIN using a master PIN.