Bot saying hi when added to guild

I’m creating a bot using Discord.js and Node.js, and I want to detect when it’s added to a guild.
How do I detect that?

Everything is working fine except that.

>Solution :

You can detect it by guildCreate event

https://discord.js.org/#/docs/main/stable/class/Client?scrollTo=e-guildCreate

client.on("guildCreate", async guild => {
    console.log("I added to a guild");
    console.log(guild);
});