Add support for fetching user guest participations

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

@@ -29,6 +29,7 @@ namespace osu.Game.Online.API.Requests
         Ranked,
         Loved,
         Pending,
+        Guest,
         Graveyard
     }
 }

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

@@ -148,6 +148,9 @@ namespace osu.Game.Online.API.Requests.Responses
         [JsonProperty(@"pending_beatmapset_count")]
         public int PendingBeatmapsetCount;
 
+        [JsonProperty(@"guest_beatmapset_count")]
+        public int GuestBeatmapsetCount;
+
         [JsonProperty(@"scores_best_count")]
         public int ScoresBestCount;
 

osu.Game/Overlays/Profile/Sections/Beatmaps/PaginatedBeatmapContainer.cs

@@ -53,6 +53,9 @@ namespace osu.Game.Overlays.Profile.Sections.Beatmaps
                 case BeatmapSetType.Pending:
                     return user.PendingBeatmapsetCount;
 
+                case BeatmapSetType.Guest:
+                    return user.GuestBeatmapsetCount;
+
                 default:
                     return 0;
             }