Beginning to create the placeholder classes

server/account_manager.hpp

@@ -0,0 +1,23 @@
+#ifndef ACCOUNTMANAGER_HPP_
+#define ACCOUNTMANAGER_HPP_
+
+#include <list>
+
+class AccountManager {
+private:
+	AccountManager() = default;
+	~AccountManager() = default;
+	static AccountManager instance;
+
+public:
+	static AccountManager* GetInstance() { return &instance; }
+
+private:
+	struct AccountEntry {
+		int index;
+	};
+
+	std::list<AccountEntry> list;
+};
+
+#endif