pfadi-bussle/pages/api/auth/[...nextauth].ts

import { NextApiRequest, NextApiResponse } from 'next'
import NextAuth from "next-auth"
import EmailProvider from "next-auth/providers/email"

import { MongoDBAdapter } from "@next-auth/mongodb-adapter"
import { MONGO_URI, MONGODB_OPTIONS } from "../../../db"
import { MongoClient } from "mongodb";

let client: MongoClient;

async function getMongoClient() {
  if (!client) {
    client = new MongoClient(MONGO_URI, MONGODB_OPTIONS);
    await client.connect();
  }

  return client;
}

export default async function auth(req: NextApiRequest, res: NextApiResponse) {
  return await NextAuth(req, res, {
    secret: process.env.NEXTAUTH_SECRET,
    adapter: MongoDBAdapter(getMongoClient()),
    providers: [
      EmailProvider({
        server: {
          host: "smtp.sendgrid.net",
          port: 587,
          auth: {
            user: "apikey",
            pass: process.env.SENDGRID_API_KEY,
          },
        },
        from: process.env.FROM_EMAIL
      }),
    ],
  })
}