Error creating verifyTokenAdmin middleware - node.js

Question

I'm trying to create two middlewares, an authentication middleware and a middleware that checks if the user in question has "isAdmin" true inside its database.
The authentication middleware works perfectly, but to make the admin middleware work, I tried to put req.users = data; inside, but it returns me the error:
Property 'users' does not exist on type 'Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>'.ts(2339)
auth middleware:
import { Request, Response, NextFunction } from 'express';
import jwt from 'jsonwebtoken';
interface TokenPayload {
id: string;
iat: number;
exp: number;
}
export default async function authMiddleware(
req: Request, res: Response, next: NextFunction
) {
const { authorization } = req.headers;
if (!authorization) {
return res.status(401).json('Invalid Authorization');
};
const token = authorization.replace('Bearer', ' ').trim();
try {
const secret = process.env.JWT_SECRET as string;
const data = jwt.verify(token, secret);
req.users = data;
const { id } = data as TokenPayload;
req.userId = id;
return next();
} catch (err) {
return res.status(401).json(err);
}
}
In auth middleware admin, in users it returns the same error
Property 'users' does not exist on type 'Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>'.ts(2339)
auth middleware admin
import { Request, Response, NextFunction } from 'express';
import jwt from 'jsonwebtoken';
import authMiddleware from './AuthMiddlewares';
export default async function authAdminMiddleware(
req: Request, res: Response, next: NextFunction,
) {
authMiddleware(req, res, () => {
if (req.users.isAdmin) {
next();
} else {
res.status(403).json("You are not alowed to do that!");
}
})
}

Answer 1

You can use declaration merging to declare the additional property users in your req object:
declare global {
namespace Express {
interface Request {
users: any
}
}
}
(See also here.)