Make sql connection public to share same connection pool. Layout calls for user info from DB. Implement login path.

src/GroovePlayer.h

@@ -66,11 +66,11 @@ public:
     };
     std::list<AudioTrack> requestQueue;
     std::list<PlayerEvent> lastInternalEvents;
+    Wt::Dbo::backend::Sqlite3* sqliteConnection;
+    Wt::Dbo::FixedSqlConnectionPool* connectionPool;
 private:
     GroovePlayerMgr (std::string dbFile);
     ~GroovePlayerMgr();
-    Wt::Dbo::backend::Sqlite3* sqliteConnection;
-    Wt::Dbo::FixedSqlConnectionPool* connectionPool;
     bool continueEventLoop = true;
     
     std::thread* grooveEvents;