diff --git a/sharp/content/domainservice/HistoryService.cs b/sharp/content/domainservice/HistoryService.cs
index 570ecd2..fdb45f2 100644
--- a/sharp/content/domainservice/HistoryService.cs
+++ b/sharp/content/domainservice/HistoryService.cs
@@ -27,7 +27,7 @@ public async Task<bool> AddHistory(long userId, long videoId)
     public async Task<Pagination<VideoDto>> Recommendation(long userId, ulong page = 0, ulong size = 10)
     {
         var historyList = await history.GetHistorys(userId, 0, 0);
-        var positiveVectors = historyList.Count != 0 ? new ReadOnlyMemory<Vector>(historyList.Select(x => new Vector(Enumerable.Range(1, 1024).Select(_ => (float)random.NextDouble()).ToArray())).ToArray()) : null;
+        var positiveVectors = historyList.Count == 0 ? new Vector[] { new(Enumerable.Range(1, 1024).Select(_ => (float)random.NextDouble()).ToArray()) } : null;
         var result = await client.RecommendAsync("videos", positive: historyList.Select(x => (ulong)x).ToList(), /* history */
             positiveVectors: positiveVectors, /* if empty positive point */
             limit: size, offset: page * size
diff --git a/sharp/content/endpoints/Endpoints.cs b/sharp/content/endpoints/Endpoints.cs
index 7f21949..2e8d0c4 100644
--- a/sharp/content/endpoints/Endpoints.cs
+++ b/sharp/content/endpoints/Endpoints.cs
@@ -106,10 +106,8 @@ public static Task AddHistory(HistoryService service,ClaimsPrincipal user , AddV
     public static void MapEndpoints(this IEndpointRouteBuilder endpoints)
     {
         endpoints.MapGet("/users/{userId:long}/videos", UserVideos).WithName("getUserVideos");
-        // endpoints.MapGet("/users/{userId:long}/likes", Likes).RequireAuthorization().WithName("getUserLikes");
-        endpoints.MapGet("/users/{userId:long}/likes", Likes).WithName("getUserLikes");
+        endpoints.MapGet("/users/{userId:long}/likes", Likes).RequireAuthorization().WithName("getUserLikes");
         endpoints.MapGet("/videos", Videos).WithName("getVideos");
-        // todo: user id
         endpoints.MapGet("/videos/recommend", RecommendVideos).WithName("getRecommendVideos");
         endpoints.MapGet("/videos/{id:long}", FindVideoById).WithName("getVideo");
         endpoints.MapGet("/videos/{id:long}/similar", SimilarVideos).WithName("getSimilarVideos");
@@ -117,7 +115,6 @@ public static void MapEndpoints(this IEndpointRouteBuilder endpoints)
         endpoints.MapPost("/videos", CreateVideo).RequireAuthorization().WithName("createVideo");
         endpoints.MapPost("/videos/history", AddHistory).RequireAuthorization().WithName("addVideoHistory");
         endpoints.MapGet("/videos/history", HistoryVideos).RequireAuthorization().WithName("getVideoHistory");
-
     }
 
 
diff --git a/sharp/content/repository/Client.cs b/sharp/content/repository/Client.cs
index 5544846..60848b9 100644
--- a/sharp/content/repository/Client.cs
+++ b/sharp/content/repository/Client.cs
@@ -129,7 +129,8 @@ public async Task<IReadOnlyList<long>> VotedOfVideos(List<long> videoIds)
     /// <summary> Scan voted videos, which means paging through all voted videos. </summary>
     public async Task<(long?, IReadOnlyList<long>)> VotedVideos(long page, int size)
     {
-        using var req = new HttpRequestMessage(HttpMethod.Get, $"/graph/videos?page={page}&size={size}");
+        var url = $"/graph/videos?page={page}&size={size}";
+        using var req = new HttpRequestMessage(HttpMethod.Get, url);
         if (!string.IsNullOrEmpty(Token) && AuthenticationHeaderValue.TryParse(Token, out var auth))
         {
             req.Headers.Authorization = auth;
@@ -212,8 +213,8 @@ public static string GetConnString(this IServiceProvider sp, string name)
         => sp.GetRequiredService<IConfiguration>().ConnString(name);
 
     public static IServiceCollection AddVoteRepository(this IServiceCollection services) => services
-        .AddHttpClient<IVoteRepository, VoteRepository>("Vote",
-            (sp, client) => client.BaseAddress = new Uri(sp.GetConnString("Vote"))).Services;
+        .AddScoped<IVoteRepository, VoteRepository>(sp => new VoteRepository(sp.GetRequiredService<IHttpClientFactory>().CreateClient("Vote")))
+        .AddHttpClient("Vote", (sp, client) => client.BaseAddress = new Uri(sp.GetConnString("Vote"))).AddAsKeyed(ServiceLifetime.Scoped).Services;
 
     public static IServiceCollection AddSearchClient(this IServiceCollection services) => services
         .AddSingleton<IConnectionMultiplexer>(sp => ConnectionMultiplexer.Connect(sp.GetRequiredService<IConfiguration>().GetConnectionString("Redis").EnsureNotNull("Redis connection string is null")))
@@ -225,9 +226,9 @@ public static IServiceCollection AddSearchClient(this IServiceCollection service
             client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
         }).Services;
 
-    public static IServiceCollection AddUserRepository(this IServiceCollection services) =>
-        services.AddHttpClient<IUserRepository, UserRepository>("User",
-            (sp, client) => client.BaseAddress = new Uri(sp.GetConnString("User"))).Services;
+    public static IServiceCollection AddUserRepository(this IServiceCollection services) => services.
+        AddScoped<IUserRepository, UserRepository>(sp => new UserRepository(sp.GetRequiredService<IHttpClientFactory>().CreateClient("User"))).
+        AddHttpClient("User", (sp, client) => client.BaseAddress = new Uri(sp.GetConnString("User"))).Services;
 
     public static IApplicationBuilder UseToken(this IApplicationBuilder app) =>
         app.Use(async (context, next) =>