Tentatively create struct DbConnection, not used yet.

csharp/App/Backend/Database/DbConnection.cs

@@ -0,0 +1,18 @@
+using InnovEnergy.App.Backend.Model;
+using SQLite;
+
+namespace InnovEnergy.App.Backend.Database;
+
+
+// TODO ?
+public struct DbConnection
+{
+    public DbConnection(SQLiteConnection connection, User caller)
+    {
+        Connection = connection;
+        Caller = caller;
+    }
+
+    public SQLiteConnection Connection { get;}
+    public User Caller { get;}
+}