Add RankHighest to APIUser

osu.Game.Tests/Visual/Online/TestSceneUserProfileOverlay.cs

@@ -137,6 +137,11 @@ namespace osu.Game.Tests.Visual.Online
                 @"top_ranks",
                 @"medals"
             },
+            RankHighest = new APIUser.UserRankHighest
+            {
+                Rank = 1,
+                UpdatedAt = DateTimeOffset.Now,
+            },
             Statistics = new UserStatistics
             {
                 IsRanked = true,

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

@@ -34,6 +34,19 @@ namespace osu.Game.Online.API.Requests.Responses
         [JsonProperty(@"previous_usernames")]
         public string[] PreviousUsernames;
 
+        [JsonProperty(@"rank_highest")]
+        [CanBeNull]
+        public UserRankHighest RankHighest;
+
+        public class UserRankHighest
+        {
+            [JsonProperty(@"rank")]
+            public int Rank;
+
+            [JsonProperty(@"updated_at")]
+            public DateTimeOffset UpdatedAt;
+        }
+
         [JsonProperty(@"country_code")]
         private string countryCodeString;