PLT-2806 sending websocket when adding user to team (#2953)

* PLT-2806 sending websocket when adding user to team

* Fixing config file

api/team.go

@@ -275,6 +275,9 @@ func JoinUserToTeam(team *model.Team, user *model.User) *model.AppError {
 	RemoveAllSessionsForUserId(user.Id)
 	InvalidateCacheForUser(user.Id)
 
+	// This message goes to every channel, so the channelId is irrelevant
+	PublishAndForget(model.NewMessage("", "", user.Id, model.ACTION_NEW_USER))
+
 	return nil
 }