Fix the admin panel only listing your character name (#3229)

Content.Shared/Administration/AdminMenu/AdminMenuPlayerListRequest.cs

@@ -0,0 +1,22 @@
+using Lidgren.Network;
+using Robust.Shared.Network;
+
+namespace Content.Shared.Administration.AdminMenu
+{
+    public class AdminMenuPlayerListRequest : NetMessage
+    {
+        #region REQUIRED
+        public static readonly MsgGroups GROUP = MsgGroups.Command;
+        public static readonly string NAME = nameof(AdminMenuPlayerListRequest);
+        public AdminMenuPlayerListRequest(INetChannel channel) : base(NAME, GROUP) { }
+        #endregion
+
+        public override void ReadFromBuffer(NetIncomingMessage buffer)
+        {
+        }
+
+        public override void WriteToBuffer(NetOutgoingMessage buffer)
+        {
+        }
+    }
+}