Update managing api security

src/Managing.Application/Shared/WebhookService.cs

@@ -1,4 +1,6 @@
+using System.Net.Http.Headers;
 using System.Net.Http.Json;
+using System.Text;
 using Managing.Application.Abstractions.Services;
 using Managing.Common;
 using Managing.Domain.Users;
@@ -20,6 +22,16 @@ public class WebhookService : IWebhookService
         _configuration = configuration;
         _logger = logger;
         _n8nWebhookUrl = _configuration["N8n:WebhookUrl"] ?? string.Empty;
+        
+        // Configure basic authentication if credentials are provided
+        var username = _configuration["N8n:Username"];
+        var password = _configuration["N8n:Password"];
+        
+        if (!string.IsNullOrEmpty(username) && !string.IsNullOrEmpty(password))
+        {
+            var credentials = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{username}:{password}"));
+            _httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", credentials);
+        }
     }
 
     public async Task SendTradeNotification(User user, string message, bool isBadBehavior = false)