public ActionResult <IEnumerable <ExpertDto> > GetExperts()
        {
            var experts = expertRepository.GetExperts();

            if (!experts.Any())
            {
                return(NotFound("There are currently no experts, please add"));
            }

            var expertsToReturn = mapper.Map <IEnumerable <ExpertDto> >(experts);

            return(Ok(expertsToReturn));
        }