init.rs

pub async fn load_or_init_api_key(token_file: &str) -> Result<ApiKey, ConfigError> {
    let token_path = path::Path::new(token_file);
    if token_path.exists() {
        let token = ApiKey::load(token_path)?;
        match ApiKey::load(token_path) {
            Ok(token) => Ok(token),
            Err(e) => {
                eprintln!("failed to read application token file:");
                eprintln!("{}", e);
                Err(e)
            }
        }
    } else {
        // create
        println!("file not found -> create token file.");
        let token = create_api_key().await?;
        token.save(token_file)?;
        Ok(token)
    }
}