How to add choice to slash command?

const { Client, CommandInteraction , MessageEmbed } = require("discord.js");

module.exports = {
    name: "new-staff",
    description: "give role to new staff",
    user: ["ADMINISTRATOR"],
    options: [
        {
            name: "user",
            description: "The user you want to add the role to",
            required: true,
            type: "USER"
        },
        {
            name: "section",
            description: "The user you want to add the role to",
            required: true,
            type: "STRING"
            
        }
    ],
    /**
     *
     * @param {Client} client
     * @param {CommandInteraction} interaction
     * @param {String[]} args
     */
    run: async (client, interaction, args) => {
        const section = interaction.options.getString("section")
        const user = interaction.options.getMember('user');

        if (section === 'mta_roles') {
            const mta_roles = ['1000138410075377706', '1000138410268311563'];

            mta_roles.forEach(async role => {
                let rl = interaction.guild.roles.cache.find(r => r.id == role);
                user.roles.add(rl);
                await wait(500);
            })
            await interaction.reply({ content: ':ballot_box_with_check: Success (MTA)', ephemeral: true });
        } else if (section === 'fivem_roles') {
            const fivem_roles = ['1000138410230558804', '1000138410268311562'];

            fivem_roles.forEach(async role => {
                let rl = interaction.guild.roles.cache.find(r => r.id == role);
                user.roles.add(rl);
                await wait(500);
            })
            await interaction.reply({ content: ':ballot_box_with_check: Success (FIVEM)', ephemeral: true });
        }
    }
};