hello guys, its my first experience with next and typescript, im trying to create an api that stream the token as soon they are generated (using langchain.js)
Im not figuring out how i can do that. I tried with res.write() method but the return is write is not a function.
here is the script. This is inside a route.ts inside src/app/api

import {chainQA} from "@/utils/conversationalQA"
import {Request, Response} from 'express';
import type { NextApiRequest, NextApiResponse } from 'next'

export async function POST(req: Request , res : Response){   
    await (await chainQA("openAi")).call(
        {
            question: "ciao.",
            chat_history: [],
        },
        [
            {
                handleLLMNewToken: async (token) => {
                    console.log(token) // here the token are generated
                },

            },
        ]
    );

}