Missing access error

const { Events, Client, GatewayIntentBits, ActionRowBuilder, ButtonBuilder, ButtonStyle, SlashCommandBuilder, EmbedBuilder, SelectMenuDefaultValueType, Embed } = require('discord.js');
const client = new Client({
    intents: [
        GatewayIntentBits.Guilds,
        GatewayIntentBits.GuildMessages,
        GatewayIntentBits.MessageContent,
        GatewayIntentBits.GuildMembers,
    ],
});
const Warning = require('../../Schemas/warning');

module.exports = {
    data: new SlashCommandBuilder()
        .setName('warn')
        .setDescription('Warn a user')
        .addUserOption(option => option.setName('user').setDescription('The user to warn').setRequired(true))
        .addStringOption(option => option.setName('reason').setDescription('The reason for the warning').setRequired(true)),
    async execute(interaction) {
        const userId = interaction.options.getUser('user').id;
        const reason = interaction.options.getString('reason');
        const moderatorId = interaction.user.id;
        const guildId = interaction.guildId;

        let warning = await Warning.findOne({ userId, guildId });

        if (!warning) {
            warning = new Warning({
                userId,
                guildId,
                warnings: []
            });
        }

        warning.warnings.push({ moderatorId, reason });
        await warning.save();

        await interaction.reply(`User has been warned for: ${reason}`);
    }
};