public void ShouldNotCreateWithInvalidCourse()
        {
            Course invalidCourse = null;

            _courseRepository.Setup(r => r.GetById(_registrationDto.CourseId)).Returns(invalidCourse);

            Assert.Throws <DomainException>(() =>
                                            _registrationCreation.Create(_registrationDto))
            .WithMessage(Messages.INVALID_COURSE);
        }
        public IActionResult Add(RegistrationDto model)
        {
            try
            {
                _registrationCreation.Create(model);
            }
            catch (DomainException exception)
            {
                return(new JsonResult(exception.ListOfRules));
            }
            catch (Exception ex)
            {
                return(new JsonResult(ex.Message));
            }

            return(Ok());
        }