i cannot declare new property in request object of express - node.js

Question

I'm trying to attach the new property to the request object in typescript.
this is the code :
import { request, Request, response, Response } from "express";
((req: Request, res: Response) => {
console.log(req.user);
})(request, response)
i'm declaring like this :
declare global {
namespace Express {
interface Request {
user: string;
}
}
}
and then I'm running it with ts-node. result is :
/home/mahdi/Desktop/learn-stuf/test/node_modules/ts-node/src/index.ts:843
return new TSError(diagnosticText, diagnosticCodes, diagnostics);
^
TSError: ⨯ Unable to compile TypeScript:
x.ts:9:21 - error TS2339: Property 'user' does not exist on type 'Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>'.
9 console.log(req.user);
~~~~
at createTSError (/home/mahdi/Desktop/learn-stuf/test/node_modules/ts-node/src/index.ts:843:12)
at reportTSError (/home/mahdi/Desktop/learn-stuf/test/node_modules/ts-node/src/index.ts:847:19)
at getOutput (/home/mahdi/Desktop/learn-stuf/test/node_modules/ts-node/src/index.ts:1057:36)
at Object.compile (/home/mahdi/Desktop/learn-stuf/test/node_modules/ts-node/src/index.ts:1411:41)
at Module.m._compile (/home/mahdi/Desktop/learn-stuf/test/node_modules/ts-node/src/index.ts:1596:30)
at Module._extensions..js (node:internal/modules/cjs/loader:1159:10)
at Object.require.extensions.<computed> [as .ts] (/home/mahdi/Desktop/learn-stuf/test/node_modules/ts-node/src/index.ts:1600:12)
at Module.load (node:internal/modules/cjs/loader:981:32)
at Function.Module._load (node:internal/modules/cjs/loader:827:12)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12) {
diagnosticCodes: [ 2339 ]
}
I tested too many answers of sites, but one of them did not work. please help.

Answer 1

First, I think your declare file got some problems.
edit the file like
export {}
declare global {
namespace Express {
interface Request {
user: string;
}
}
}
or
namespace Express {
interface Request {
user?: string
}
}
add directory that contains the declare file in tsconfig. Since I usually name it express.d.ts and place in src/types folder, in my case, tsconfig.json will be edited like this
{
"compilerOptions": {
"typeRoots": ["src/types"],
}
}
lastly, also add ts-node configuration in tsconfig.json. (not in compilerOptions)
{
"ts-node": {
"files": true
}
}

Answer 2

Are you maybe looking for #types/express ?
You can also fix it with intersection type :
function endpoint (req: Request, res: Response & {user: string;}) {
console.log(req.user);
}
But maybe you are looking for req.body.user, type Response<{user: string;}> ?