public IActionResult deleteContest(int id)
        {
            var claimsIdentity = this.User.Identity as ClaimsIdentity;

            try
            {
                userService.IsUserAnOrganizator(claimsIdentity);
                contestService.deleteContest(id);
                return(Ok());
            }
            catch (Exception e)
            {
                return(BadRequest(new { message = e.Message }));
            }
        }