discord.js ping not working code example

Example 1: Bots latency discord js

var yourping = new Date().getTime() - message.createdTimestamp
var botping = Math.round(bot.ws.ping)

message.channel.send(`Your ping: ${yourping} \nBots ping: ${botping}`)

Example 2: how to make a ping in discord.js

if(cmd === `${prefix}ping`) {
        message.channel.send("Pinging...").then(m =>{
            var ping = m.createdTimestamp - message.createdTimestamp;
            var botPing = Math.round(bot.pi);

            m.edit(`**:ping_pong: Pong! Your Ping Is:-**\n  ${ping}ms`);
        });
    }