diff --git a/src/Application/Interfaces/ISearchDeviceService.cs b/src/Application/Interfaces/ISearchDeviceService.cs
index ff016a6..2e5f5bd 100644
--- a/src/Application/Interfaces/ISearchDeviceService.cs
+++ b/src/Application/Interfaces/ISearchDeviceService.cs
@@ -8,6 +8,6 @@ namespace ProgGym.PrinterMonitor.Application.Interfaces
 {
     public interface ISearchDeviceService
     {
-        public Task<List<string>> GetPrinters();
+        public List<string> GetPrinters();
     }
 }
diff --git a/src/Domain-Win/Interfaces/IAuthDomain.cs b/src/Domain-Win/Interfaces/IAuthDomain.cs
new file mode 100644
index 0000000..230f253
--- /dev/null
+++ b/src/Domain-Win/Interfaces/IAuthDomain.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.DirectoryServices;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProgGym.PrinterMonitor.Domain_Win.Interfaces
+{
+    public interface IAuthDomain
+    {
+        public DirectoryEntry GetEntry(string? path, string? username, string? password);
+    }
+}
diff --git a/src/Domain-Win/Services/SearchDeviceService.cs b/src/Domain-Win/Services/SearchDeviceService.cs
index 26bd483..84c6b80 100644
--- a/src/Domain-Win/Services/SearchDeviceService.cs
+++ b/src/Domain-Win/Services/SearchDeviceService.cs
@@ -9,26 +9,27 @@
 using ProgGym.PrinterMonitor.Application.Interfaces;
 using System.DirectoryServices;
 using ProgGym.PrinterMonitor.Application;
+using ProgGym.PrinterMonitor.Domain_Win.Interfaces;
 
 namespace ProgGym.PrinterMonitor.Domain_Win.Services
 {
     public class SearchDeviceService : ISearchDeviceService
     {
-        private readonly MonitorSettings _monitorSettings;
-
-        public SearchDeviceService(MonitorSettings monitorSettings)
+        private readonly MonitorSettings monitorSettings;
+        private readonly IAuthDomain authDomain;
+        private List<string?> printers = new List<string?>();
+        
+        public SearchDeviceService(MonitorSettings monitorSettings, IAuthDomain authDomain)
         {
-            _monitorSettings = monitorSettings;
+            this.monitorSettings = monitorSettings;
+            this.authDomain = authDomain;
         }
 
-        public async Task <List<string>> GetPrinters()
+        public List<string?> GetPrinters()
         {
-            List<string> printers = new List<string>();
-            DirectoryEntry root = new(_monitorSettings.DomainPath,
-                                      _monitorSettings.DomainUserName,
-                                      _monitorSettings.DomainPassword);
-
-            DirectorySearcher searcher = new DirectorySearcher(root);
+            DirectorySearcher searcher = new DirectorySearcher(this.authDomain.GetEntry(this.monitorSettings.DomainPath, 
+                                                                                        this.monitorSettings.DomainUserName,
+                                                                                        this.monitorSettings.DomainPassword));
             searcher.Filter = "(objectClass=printQueue)";
             searcher.PropertiesToLoad.Add("cn");
             foreach (SearchResult result in searcher.FindAll())
diff --git a/src/Domain-Win/Services/authDevice.cs b/src/Domain-Win/Services/authDevice.cs
new file mode 100644
index 0000000..d755311
--- /dev/null
+++ b/src/Domain-Win/Services/authDevice.cs
@@ -0,0 +1,21 @@
+using ProgGym.PrinterMonitor.Domain_Win.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.DirectoryServices;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProgGym.PrinterMonitor.Domain_Win.Services
+{
+    public class AuthDevice: IAuthDomain
+    {
+        public DirectoryEntry GetEntry(string? path, string? username, string? password) 
+        {
+            DirectoryEntry root = new DirectoryEntry(path, username, password);
+            return root;
+        }
+
+        
+    }
+}