[cas] use http client factory

modules/CombotAntiSpam/Combot/CombotClient.cs

@@ -1,5 +1,4 @@
-using System;
-using System.Net.Http;
+using System.Net.Http;
 using System.Threading.Tasks;
 using Kruzya.TelegramBot.Core.Extensions;
 using Telegram.Bot.Types;
@@ -8,12 +7,11 @@ namespace Kruzya.TelegramBot.CombotAntiSpam.Combot;
 
 public class CombotClient : ICombotClient
 {
-    public HttpClient _HttpClient;
+    private readonly HttpClient _httpClient;
 
-    public CombotClient()
+    public CombotClient(HttpClient httpClient)
     {
-        _HttpClient = new HttpClient();
-        _HttpClient.BaseAddress = new Uri("https://api.cas.chat/check");
+        _httpClient = httpClient;
     }
         
     public bool IsSpammer(User user)
@@ -23,7 +21,7 @@ public class CombotClient : ICombotClient
 
     public async Task<bool> IsSpammerAsync(User user)
     {
-        var result = await _HttpClient.GetJsonAsync<CombotApiResponse>($"?user_id={user.Id}");
+        var result = await _httpClient.GetJsonAsync<CombotApiResponse>($"?user_id={user.Id}");
         return result.IsSpammer;
     }
 }

modules/CombotAntiSpam/CombotAntiSpam.cs

@@ -1,6 +1,7 @@
 using Kruzya.TelegramBot.CombotAntiSpam.Combot;
 using Kruzya.TelegramBot.Core;
 using Microsoft.Extensions.DependencyInjection;
+using System;
 
 namespace Kruzya.TelegramBot.CombotAntiSpam;
 
@@ -12,6 +13,9 @@ public class CombotAntiSpam : Module
 
     public override void ConfigureServices(IServiceCollection services)
     {
-        services.AddSingleton<ICombotClient, CombotClient>();
+        services.AddHttpClient<ICombotClient, CombotClient>(c =>
+        {
+            c.BaseAddress = new Uri("https://api.cas.chat/check");
+        });
     }
 }