discord js ping command

1if(cmd === `${prefix}ping`) {
2        message.channel.send("Pinging...").then(m =>{
3            var ping = m.createdTimestamp - message.createdTimestamp;
4            var botPing = Math.round(bot.pi);
5
6            m.edit(`**:ping_pong: Pong! Your Ping Is:-**\n  ${ping}ms`);
7        });
8    }

1if (command === 'ping') {
2  message.channel.send (`${client.ws.ping} ms`)
3}