Entities/Member: Add OrganicAuthorityCode

Elwig/ViewModels/MemberAdminViewModel.cs

@@ -118,6 +118,8 @@ namespace Elwig.ViewModels {
         [ObservableProperty]
         private string? _lfbisNr;
         [ObservableProperty]
+        private string? _organicAuthorityCode;
+        [ObservableProperty]
         private bool _isBuchführend;
         [ObservableProperty]
         private bool _isOrganic;