Add project files.

LeagueAPI/Models/ChampSelect/ChampSelectChatRoomDetails.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+
+namespace LeagueAPI.Models.ChampSelect;
+
+public record class ChampSelectChatRoomDetails
+{
+    [JsonPropertyName("multiUserChatId")]
+    public string? MultiUserChatId { get; init; }
+
+    [JsonPropertyName("multiUserChatPassword")]
+    public string? MultiUserChatPassword { get; init; }
+
+    [JsonPropertyName("mucJwtDto")]
+    public MucJwtDto? MucJwtDto { get; init; }
+}