public Endpoints(string clientId, string clientSecret, bool sandbox)
{
this.clientId = clientId;
this.clientSecret = clientSecret;
string jsonString = Resources.ResourceManager.GetString("endpoints");
this.endpoints = JObject.Parse(jsonString);
this.httpHelper = new HttpHelper();
this.httpHelper.BaseUrl = sandbox ? Endpoints.ApiBaseSandboxURL : Endpoints.ApiBaseURL;
this.token = null;
}