Add check for bot messages.

Added a check so bot messages do not trigger any commands involuntariy.

docs/guides/commands/samples/intro/command_handler.cs

@@ -35,9 +35,10 @@ public class CommandHandler
         // Create a number to track where the prefix ends and the command begins
         int argPos = 0;
 
-        // Determine if the message is a command based on the prefix
+        // Determine if the message is a command based on the prefix and make sure no bots trigger commands
         if (!(message.HasCharPrefix('!', ref argPos) || 
-            message.HasMentionPrefix(_client.CurrentUser, ref argPos)))
+            message.HasMentionPrefix(_client.CurrentUser, ref argPos)) ||
+            message.Author.IsBot)
             return;
 
         // Create a WebSocket-based command context based on the message
@@ -60,4 +61,4 @@ public class CommandHandler
         // if (!result.IsSuccess)
         // await context.Channel.SendMessageAsync(result.ErrorReason);
     }
-}
+}