Function read_password 

pub fn read_password(
    prompt: &str,
    password_override: Option<&str>,
    use_askpass: bool,
) -> Result<String>

Reads a password either from the provided argument, via the system’s askpass tool when enabled, or interactively via rpassword.

Arguments

• prompt - The prompt to show the user.
• password - An optional password string.
• use_askpass - Boolean flag to indicate if the system’s askpass should be used.

Returns

A Result wrapping the password string. Ask the user for a password, honoring explicit overrides, graphical helpers, and finally falling back to a plain TTY prompt.