public string CreateStudent(CreateStudentCommand command)
        {
            //command.CourseIds = new List<int>() { 4 };
            StudentsCommandHandler handler = new StudentsCommandHandler();

            return(handler.Handle(command));
        }
        public string DeleteStudent(DeleteStudentCommand command)
        {
            StudentsCommandHandler handler = new StudentsCommandHandler();

            return(handler.Handle(command));
        }