53        static std::map<std::string, NAF::Extras::Session>& get_sessions()
 
   55            auto& var = sessions_;
 
   60            auto& var = credentials_;
 
   64        static void ReadSessions_();
 
   66        static void DeleteSession_(std::string 
id);
 
   69        static bool SessionExists_(std::string 
id);
 
   72        static std::mutex mutex_;
 
   73        static std::map<std::string, NAF::Extras::Session> sessions_;