fix sharded client current user (#1947)

src/Discord.Net.WebSocket/DiscordShardedClient.cs

@@ -495,10 +495,13 @@ namespace Discord.WebSocket
             client.GuildScheduledEventUserAdd += (arg1, arg2) => _guildScheduledEventUserAdd.InvokeAsync(arg1, arg2);
             client.GuildScheduledEventUserRemove += (arg1, arg2) => _guildScheduledEventUserRemove.InvokeAsync(arg1, arg2);
         }
-#endregion
+        #endregion
 
         #region IDiscordClient
         /// <inheritdoc />
+        ISelfUser IDiscordClient.CurrentUser => CurrentUser;
+
+        /// <inheritdoc />
         async Task<IApplication> IDiscordClient.GetApplicationInfoAsync(RequestOptions options)
             => await GetApplicationInfoAsync().ConfigureAwait(false);