Auth integration

Data/AppSettings.cs

@@ -3,6 +3,7 @@ namespace timetracker.Data;
 public class AppSettings
 {
     public int Id { get; set; }
+    public int UserId { get; set; }
     public double DailyTargetHours { get; set; } = 7.5;
     public int MinimumBreakMinutes { get; set; } = 30;
     public int VacationDaysPerYear { get; set; } = 30;