delete message discord js

1message.reply('Invalid command')
2  .then(msg => {
3                msg.delete({ timeout: 20000 /*time unitl delete in milliseconds*/});
4            })
5  .catch(/*Your Error handling if the Message isn't returned, sent, etc.*/);

1message.delete()

1"create a variable called id"
2var id
3"then inside your client message statement change id ->  id = message.id"
4client.on('message', message => {
5  id = message.id
6});
7"inside your command type  message.fetch(id).then(msg => msg.delete());"
8  if (message.content === !test)
9      message.fetch(id).then(msg => msg.delete());      
10}});

1// ASSUMPTIONS:
2// channel: the channel you want the message to be sent in
3// lastmsg: the id of the last poll message
4
5channel.fetchMessage(lastmsg).then(msg => msg.delete());
6