I have the following error Property 'admin' does not exist on type 'User | undefined', I'm trying to validate if the user is admin or not, can you help me to check where is the issue?

import { Request, Response, NextFunction } from "express";
import { getCustomRepository } from "typeorm";
import { UsersRepositories } from "../repositories/UsersRepositories";

export async function ensureAdmin(request: Request, response: Response, next: NextFunction) {

    const { user_id } = request;
    console.log(user_id);

    const usersRepositories = getCustomRepository(UsersRepositories);
    const { admin } = await usersRepositories.findOne(user_id);

    //verificar se o usuario é admin.
    if (admin) {
        return next();
    }

    return response.status(401).json({
        error: "Unauthorized!"
    })
}