private static IRestRequest NewAccessTokenRequest()
{
var request = RestRequest("auth/login", Method.POST);
request.AlwaysMultipartFormData = true;
request.AddHeader(AuthInstanceIdString, BacktoryConfig.BacktoryAuthInstanceId);
request.AddHeader(AuthClientKeyString, BacktoryConfig.BacktoryAuthClientKey);
request.AddHeader("X-Backtory-Authentication-Refresh", "1");
request.AddParameter("refresh_token", BacktoryUser.GetRefreshToken(), ParameterType.GetOrPost);
return(request);
}