pub fn new() -> Self {

    Self {

      keys_location: None,

      vault_location: None,

      key_name: None,

    }

  }

  pub fn set_keys_location(&mut self, keys_location: &str) {

    self.keys_location = Some(keys_location.to_string());

  }

  pub fn set_vault_location(&mut self, vault_location: &str) {

    self.vault_location = Some(vault_location.to_string());

  }

  pub fn keys_location(&self) -> String {

    self.keys_location.clone().unwrap_or_else(|| {

      let home_dir = if cfg!(target_os = "windows") {

        env::var("USERPROFILE").unwrap_or_else(|_| "./.mk/priv".to_string())

        env::var("HOME").unwrap_or_else(|_| "./.mk/priv".to_string())

      let mut path = PathBuf::from(home_dir);

      path.push(".config");

      path.push("mk");

      path.push("priv");

      path.to_string_lossy().to_string()

    })

  }

  pub fn vault_location(&self) -> String {

    self.vault_location.clone().unwrap_or("./.mk/vault".to_string())

  }

  pub fn key_name(&self) -> String {

    self.key_name.clone().unwrap_or("default".to_string())

  }