问如何创建discord.js ping命令？

EN

const Discord = require("discord.js");
const client = new Discord.Client();

client.on("message", (message) => {
  if (message.content === '!ping') {
    message.channel.send("Pinging ...")
      .then((msg) => {
        msg.edit("Pong: " + (Date.now() - msg.createdTimestamp) + "ms")
      });
  }
})

client.login("TOKEN")

// Requiring the client and message embed objects from discordjs module
const { Client, MessageEmbed } = require('discord.js');

// New discordjs client
const client = new Client(); // Name it as you want

// Ready event !
client.on("ready", () => {
 // Sends something to the console to say that the bot is ready to work !
 console.log("The bot is connected !")
});

client.on("message", message => {
 // Ping command !
 if(message.content === "!ping") {
   // New embed for the bot ping !
   const embed = new Discord.MessageEmbed()
    .setDescription(`**? My ping is : **\`${Math.round(client.ws.ping)}ms\``)
   // Now we send the embed to our channel !
   message.channel.send(embed)
 } // End of our command code !
})

// Now logs in the bot using your token (keep secret !)
client.login(process.env.TOKEN)

client.on("message", (message) => {
  if (message.content === '!ping') {
    message.channel.send("Latency is ${Date.now() - message.createdTimestamp}ms`")
      });
  }
})