/// A simple struct for user data
pub struct User {
    name: String,
    email: String,
}

/// Login function validates credentials
pub fn login(user: &str, pass: &str) -> Result<(), Error> {
    Ok(())
}

/// User trait defines user-related behaviors
pub trait UserTrait {
    fn get_name(&self) -> String;
}

/// Impl block for User
impl User {
    pub fn new(name: String) -> Self {
        Self { name, email: String::new() }
    }
}

/// Constant for maximum retry attempts
pub const MAX_RETRIES: u32 = 3;

/// Static variable for tracking total logins
pub static mut TOTAL_LOGINS: u32 = 0;

/// Type alias for user ID
pub type UserId = String;