public ActionResult EmailSurvey([FromBody] EmailSurveyRequest req)
{
ISurvey emailSurvey = SurveyFactory.Build(SurveyTypes.EmailSurvey);
var survey = _context.Survey.Find(req.SurveyId);
emailSurvey.LoadSurvey(survey);
emailSurvey.execute();
return Ok();
}