custom Express request object in typescript

To add a custom request head for deserialize user in authentication

Property 'user' does not exist on type 'Request<ParamsDictionary, any, any, ParsedQs, Record<string, any>>'.

To fix the error,two things needs to be done

1. add type roots in tsconfig.json

// tsconfig.json
"typeRoots": [
      "./typings",
      "./node_modules/@types"
    ] /* List of folders to include type definitions from. */,

1. add the custom type here

// typings/express/index.d.ts
declare namespace Express {
  interface Request {
    customTypes: {
      // add the custom types here
    };
  }
}

more infos refers to the link