public CodeRunnersController(CourseCodesContext context, IMapper mapper, ICodeExecutionService codeExecutionService)
 {
     _context = context ??
                throw new System.ArgumentNullException(nameof(context));
     _mapper = mapper ??
               throw new System.ArgumentNullException(nameof(mapper));
     _codeExecutionService = codeExecutionService ??
                             throw new System.ArgumentNullException(nameof(codeExecutionService));
 }