Add Password Masking & Verification During User Registration and Login

[HilariousSoupXD]

Currently, user passwords are entered in plain text during both registration and login. This poses a potential security and user experience issue.

1. Password Masking:

• When a user types a password in the terminal, it should be hidden (not displayed) using standard terminal input masking (replaced with *).

2. Password Verification (During Registration):

• After the user enters the password, prompt them to re-enter it for confirmation.
• If the passwords don’t match, display an error and ask again.

3. Consistent Experience During Login:

• Mask password input during login as well.

I trust the maintainers to label this issue accordingly.

[HilariousSoupXD]

I plan to resolve this issue via:

1. Use _getch() to read password without echo.
2. Compare password and confirm password.
3. Integrate it in the pre-existing functions.