Missing attribute

src/Discord.Net/API/Client/GatewaySocket/Commands/Identify.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 
 namespace Discord.API.Client.GatewaySocket
 {
+    [JsonObject(MemberSerialization.OptIn)]
     internal sealed class IdentifyCommand : IWebSocketMessage
     {
         int IWebSocketMessage.OpCode => (int)OpCodes.Identify;