Protect password input and add confirm password

Currently the inputting a password is not secure at all. We need to add a encryption when typing the password.
like swapping letters with asterisk(*) when typing.

No files, tests, or entry points are mentioned. Start by listing the repository and locating the CLI path that handles user login/sign-up, then read the password input routine there. Add masked input (e.g., * for each char) and a confirm-password step in that same flow, then run the relevant CLI command manually to confirm behavior and error handling.

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