// COMPILING

 13     [[nodiscard]] std::string message(int ev) const override {
 14         switch (static_cast<ErrorCode>(ev)) {
 15         case ErrorCode::NOT_RUNNING: {
 16             return "The service is not running.";
 17         }
 18         case ErrorCode::CANNOT_START_SERVICE: {
 19             return "Cannot start web service, unable to connect to server.";
 20         }
 21         case ErrorCode::CANNOT_STOP_SERVICE: {
 22             return "Cannot stop web service.";
 23         }
 24         case ErrorCode::USER_NOT_FOUND:
 25             return "No user was found.";
 26         }
 27         return ERROR_UNRECOGNISED_MSG;
 28     }



 // AFTER CHANGE - NOT COMPILING

 13     [[nodiscard]] std::string message(int ev) const override {
 14         switch (static_cast<ErrorCode>(ev)) {
 15         case ErrorCode::NOT_RUNNING: {
 16             return "The service is not running.";
 17         }
 18         case ErrorCode::CANNOT_START_SERVICE: {
 19             return "Cannot start web service, unable to connect to server.";
 20         }
 21         case ErrorCode::CANNOT_STOP_SERVICE: {
 22             return "Cannot stop web service.";
 23         }
 24         case ErrorCode::USER_NOT_FOUND:
 25             return "No user was found.";
 26         }
 27         case ErrorCode::MACHINE_SETTING_UPDATE_ERROR:
 28             return "No user was found.";
 29         }
 30         return ERROR_UNRECOGNISED_MSG;
 31     }