el.xwx.moe/pages/api/hello.ts

import type { NextApiRequest, NextApiResponse } from "next";
import { getServerSession } from "next-auth/next";
import { authOptions } from "pages/api/auth/[...nextauth]";

type Data = {
  message: string;
  data?: object;
};

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse<Data>
) {
  const session = await getServerSession(req, res, authOptions);

  console.log(session);

  if (!session) {
    res.status(401).json({ message: "You must be logged in." });
    return;
  }

  return res.json({
    message: "Success",
  });
}