linker errors

dCommon/JSONUtils.h

@@ -0,0 +1,11 @@
+#ifndef _JSONUTILS_H_
+#define _JSONUTILS_H_
+
+#include "json_fwd.hpp"
+
+namespace JSONUtils {
+	// check required data for reqeust
+	std::string CheckRequiredData(const nlohmann::json& data, const std::vector<std::string>& requiredData);
+}
+
+#endif // _JSONUTILS_H_