How do you tag people with a slack bot?

Question

I built a bot for slack. It reads the message when a new user joins and I intend for it to post a message welcoming them: "Welcome @user! What are you building!?"

When it posts @user it doesn't seem as though the actual "tag" is working. Do I need to tag their user ID when I tag people with a bot instead of just using @user?

Answer 1

The correct format is <@userID>

You will simply get the user ID from the event (in your screenshot, the channel_join event)

{     "type": "message",     "subtype": "channel_join",     "ts": "1358877458.000011",     "user": "U2147483828",     "text": "<@U2147483828|cal> has joined the channel" } 

Update: (I have not checked the solution proposed in the edit)

In the new Bolt SDK you can tag user by using the brackets around the @NameOfUser. So the example above could also be:

{     "type": "message",     "subtype": "channel_join",     "ts": "1358877458.000011",     "user": "U214####",     "text": "<@NameOfUser> has joined the channel" } 

You would need to parse the @Name out of the message of course.