next.js/examples/api-routes-rest/pages/api/users.ts

import type { NextApiRequest, NextApiResponse } from "next";
import type { User } from "../../interfaces";

// Fake users data
const users: User[] = [{ id: 1 }, { id: 2 }, { id: 3 }];

export default function handler(
  _req: NextApiRequest,
  res: NextApiResponse<User[]>,
) {
  // Get data from your database
  res.status(200).json(users);
}