deploy-commands.js

const { SlashCommandBuilder } = require('@discordjs/builders');
const { REST } = require('@discordjs/rest');
const { Routes } = require('discord-api-types/v9');
const { clientId, guildId, token } = require('./config.json');

const commands = [
	new SlashCommandBuilder().setName('notfiy').setDescription(`Notify users who have the role by direct message from the bot!`) .addStringOption(option => option.setName('message').setDescription('The message you want sent to the users who have the role!')),
]
	.map(command => command.toJSON());

const rest = new REST({ version: '9' }).setToken(token);

rest.put(Routes.applicationGuildCommands(clientId, guildId), { body: commands })
	.then(() => console.log('Successfully registered application commands.'))
	.catch(console.error);