[...nextauth].ts

import NextAuth, { NextAuthOptions } from "next-auth"
import GithubProvider from "next-auth/providers/github"

export const authOptions: NextAuthOptions = {
  providers: [
    GithubProvider({
      clientId: process.env.GITHUB_ID,
      clientSecret: process.env.GITHUB_SECRET,
    }),
  ],
  callbacks: {
    jwt({ token, profile }) {
      if (profile) token.id = profile.id
      return token
    },
    async session({ session, token }) {
      session.id = token.id
      return session
    },
  },
}

export default NextAuth(authOptions)