// conver to string
let mongo_wallet = MongoWallet::default();
let wallet_string = serde_json::to_string(&mongo_wallet).expect("error ");
let res = Response::response_formatter("1".to_string(), "".to_string(), wallet_string);

println!("response .... {}", res);
let data_set :Vec<&str>= res.split(r"n").collect();

let response_code = match data_set.get(0){
    Some(data)=>{data},
    None=>{""}
};
let response_message = match data_set.get(2){
    Some(data)=>{data.to_string()},
    None=>{"".to_string()}
};

// 
let wallet:MongoWallet = match serde_json::from_str(&response_message){
    Ok(data)=>{data},
    Err(err)=>{
        println!("error {:?}", err);
        return }
};

println!("wallet {:?}", wallet);