Basic request implementation

osu.Game/Online/API/Requests/GetUserKudosuHistoryRequest.cs

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+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using osu.Game.Online.API.Requests.Responses;
+
+namespace osu.Game.Online.API.Requests
+{
+    public class GetUserKudosuHistoryRequest : PaginatedAPIRequest<List<APIKudosuHistory>>
+    {
+        private readonly long userId;
+
+        public GetUserKudosuHistoryRequest(long userId, int page = 0, int itemsPerPage = 5)
+            : base(page, itemsPerPage)
+        {
+            this.userId = userId;
+        }
+
+        protected override string Target => $"users/{userId}/kudosu";
+    }
+}

osu.Game/Online/API/Requests/Responses/APIKudosuHistory.cs

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+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using Newtonsoft.Json;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class APIKudosuHistory
+    {
+        [JsonProperty("id")]
+        public int ID;
+
+        [JsonProperty("createdAt")]
+        public DateTimeOffset CreatedAt;
+
+        [JsonProperty("amount")]
+        public int Amount;
+    }
+}