My logic has this on a client-side page, after the sign-in is completed, and gets params from a database using MongoDB.

After the signing, my logic uses the email from useSession to check the database, and see if the param I need already exists in the database for that user. In your case, I would be checking the database to see if the companyName exists or not in the database. If it does exist, then get it from the database, and pass it to NextAuth using a client-side page and something like this: const res = await fetch(/api/auth/session?company=${updateCompany})

If companyName doesn't exist, then request that info from the user first and then pass the response to nextAuth.

It's important to note that as far as I can tell, NextAuth will not get params out of your database automatically for anything outside the defaults. I use a separate API call to MongoDB to get params out of the database that I need.

@jackshelloworld i have the same need, in your sample code

      if(req.query.name) {
        token.name = req.query.name
        return token
      } else {
        return token
      }
    },

where the req object coming from?

@ahmed-adly-khalil check out the original code in the post on this thread from @balazsorban44 - If you combine that code with my code sample it will look something like this:

export default async function auth(req, res) {
  return NextAuth(req, res, {
    // rest of your config
      if(req.query.name) {
        token.name = req.query.name
        return token
      } else {
        return token
      }
    }
  })
}

The req object is coming from the URL parameters, the key-value pairs!

I need to get it inside the signIn callback. Any ways i can do this?

I call my backend inside it and want to pass some info there.

I was pretty confused where you put the function export default async function auth(req, res) {

I was just thinking you overwrite one of theses API calls with it.

The function call should replace your default export in [...nextauth].ts

A full example would look like

export default async function auth(req: NextApiRequest, res: NextApiResponse) {
	return await NextAuth(req, res, {
		adapter: PrismaAdapter(prisma),
		providers: [
			DiscordProvider({
				clientId: process.env.DISCORD_CLIENT_ID as string,
				clientSecret: process.env.DISCORD_CLIENT_SECRET as string,
			}),
			GoogleProvider({
				clientId: process.env.GOOGLE_CLIENT_ID as string,
				clientSecret: process.env.GOOGLE_CLIENT_SECRET as string,
			}),
			AppleProvider({
				clientId: process.env.APPLE_ID as string,
				clientSecret: process.env.APPLE_SECRET as string,
			}),
		],
		callbacks: {
			async session({ session, user }) {
				// you have access to req from above. Get your query params from there :)
				return session;
			},
		},
	});
}

Using query params doesn't seem to work with this though if you're just setting the callbackUrl. You'll need to call it like this const res = await fetch(/api/auth/session?name=${updateName}) instead of using the client API

Still can't find out how to get this to work using the client API though. Doesn't seem possible.

Made a discussion post about this
#5997