add db config

msql_acces.h

@@ -11,7 +11,9 @@
 class msql_acces : public data_acces
 {
 public:
-  msql_acces();
+  static msql_acces* get_instance();
+  static std::string user;
+  static std::string pass;
   std::string get_passwd(std::string username);
   bool get_admin(std::string);
   std::list<std::string> get_pinfo();
@@ -22,6 +24,8 @@ public:
   void create_user(std::string user, std::string pass, bool admin);
   void remove_user(std::string user);
 private:
+  msql_acces();
+  static msql_acces* instance;
   sql::Connection *con;
   sql::Driver *driver;
 };