fn test_config_structure() {

    let config = Config {

        site_url: "http://localhost:3000".to_string(),

        redis_url: "redis://localhost:6379".to_string(),

        client_origin: "http://localhost:3000".to_string(),

        access_token_private_key: "private_key".to_string(),

        access_token_public_key: "public_key".to_string(),

        access_token_expires_in: "15m".to_string(),

        access_token_max_age: 15,

        refresh_token_private_key: "refresh_private_key".to_string(),

        refresh_token_public_key: "refresh_public_key".to_string(),

        refresh_token_expires_in: "60m".to_string(),

        refresh_token_max_age: 60,

    };

    assert_eq!(config.site_url, "http://localhost:3000");

    assert_eq!(config.redis_url, "redis://localhost:6379");

    assert_eq!(config.access_token_max_age, 15);

    assert_eq!(config.refresh_token_max_age, 60);

}