Can someone help me figure out this error? I really dont know what to do. I tried my best to get rid of this error, but nothing worked. I will be very grateful if you try to help me. This code is supposed to give you basic information about user that you pinged.

const Command = require("../Structures/Command.js");

/**
 * @param {Client} client
 * @param {Message} message
 * @param {String[]} args 
 */

module.exports = new Command({
    name: "userinfo",
    description: 'info',

    async run(client, message, args) {
        const user = message.mentions.member.first() || message.member.user.username;
        const member = message.guild.members.cache.get(user.id);

        const embed = new MessageEmbed()
            .setColor('DARK_RED')
            .setAuthor({ name: user.username, iconURL: user.avatarURL({ dynamic: true }) })
            .setDescription("Kdo to je")
            .setThumbnail(user.displayAvatarURL({ dynamic: true }))
            .addFields(
            { name: "Username", value: user.username, inline: true }, 
            { name: "Tag", value: user.discriminator, inline: true }, 
            { name: "Bot", value: user.bot, inline: true }, 
            { name: "Nickname", value: member.nickname || "None", inline: true },
            { name: "Joined:", value: new Date(member.joinedTimestamp()).toDateString(), inline: true },
            { name: "Discord user since:", value: new Date(user.createdTimestamp()).toDateString(), inline: true },
            { name: "Roles count:", value: member.roles.cache - 1, inline: true },

            )

        return message.channel.send({ embeds: [embed] });
    }

})

Im also sharing my simple command handler, because its used in this code.

const Client = require("./Client.js");

/**
 * @param {Discord.Message} message 
 * @param {string[]} args 
 * @param {Client} client 
 */
function RunFunction(message, args, client) {}


class Command {

    /**
     * @typedef {{name: string, description: string, run: RunFunction}} CommandOptions
     * @param {CommandOptions} options 
     */
    constructor(options) {
        this.name = options.name;
        this.description = options.description;
        this.permission = options.permission;
        this.run = options.run;
    }
}

module.exports = Command;