diff --git a/AIParkingApplication/Util.cs b/AIParkingApplication/Util.cs
index 6886a31..b89e128 100644
--- a/AIParkingApplication/Util.cs
+++ b/AIParkingApplication/Util.cs
@@ -1,5 +1,6 @@
 using Newtonsoft.Json;
 using System;
+using System.Configuration;
 using System.Diagnostics;
 using System.Drawing;
 using System.IO;
@@ -174,6 +175,29 @@ namespace AIParkingApplication
             hostName = hostParts[0];
             int.TryParse(hostParts[1], out port);
         }
+
+        public static void AddOrUpdateAppSettings(string key, string value)
+        {
+            try
+            {
+                var configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
+                var settings = configFile.AppSettings.Settings;
+                if (settings[key] == null)
+                {
+                    settings.Add(key, value);
+                }
+                else
+                {
+                    settings[key].Value = value;
+                }
+                configFile.Save(ConfigurationSaveMode.Modified);
+                ConfigurationManager.RefreshSection(configFile.AppSettings.SectionInformation.Name);
+            }
+            catch (ConfigurationErrorsException)
+            {
+                Console.WriteLine("Error writing app settings");
+            }
+        }
     }
 
     public class PlateRequestEngineModel