private IEnumerator AddCoinRequest(string token, int cantidad)
    {
        UnityWebRequest addCoinRequest = UnityWebRequest.Post("https://unitrivia.herokuapp.com/api/tienda/insertarMonedas", "");

        addCoinRequest.SetRequestHeader("jwt", token);
        addCoinRequest.SetRequestHeader("cantidad", "" + cantidad);
        yield return(addCoinRequest.SendWebRequest());

        Debug.Log("ResponseCode: " + addCoinRequest.responseCode);

        if (addCoinRequest.result == UnityWebRequest.Result.ConnectionError)
        {
            Debug.Log("ERROR CONNECTION:" + addCoinRequest.result);

            ErrorDataScript.setErrorText("Error de conexión");
            ErrorDataScript.setButtonMode(1);
            SceneManager.LoadScene("Error Scene", LoadSceneMode.Additive);
        }
        else if (addCoinRequest.responseCode != 200)
        {
            Debug.Log("ERROR ADDCOIN:" + addCoinRequest.downloadHandler.text);
            ErrorReturn result = ErrorReturn.CreateFromJSON(addCoinRequest.downloadHandler.text);

            ErrorDataScript.setErrorText(result.message);
            ErrorDataScript.setButtonMode(1);
            SceneManager.LoadScene("Error Scene", LoadSceneMode.Additive);
        }
        else
        {
            Debug.Log("EXITO ADDCOIN:" + addCoinRequest.downloadHandler.text);
            UserDataScript.addCoins(cantidad);
            Debug.Log("Insertada 1 moneda");
        }
    }