Auth.js Snippets

import type { NextAuthConfig } from 'next-auth';
 
export const authConfig = {
  pages: {
    signIn: '/login',
  },
  providers: [
    // ...
  ],
  callbacks: {
    authorized({ auth, request: { nextUrl } }) {
      let isLoggedIn = !!auth?.user;
      let isOnDashboard = nextUrl.pathname.startsWith('/protected');
 
      if (isOnDashboard) {
        if (isLoggedIn) return true;
        return false; // Redirect unauthenticated users to login page
      } else if (isLoggedIn) {
        return Response.redirect(new URL('/protected', nextUrl));
      }
 
      return true;
    },
  },
} satisfies NextAuthConfig;

import Credentials from 'next-auth/providers/credentials';
import { compare } from 'bcrypt-ts';
import { getUser } from 'app/db'; // your db logic
 
// [...]
  providers: [
    Credentials({
      async authorize({ email, password }: any) {
        let user = await getUser(email);
        if (user.length === 0) return null;
        let passwordsMatch = await compare(password, user[0].password!);
        if (passwordsMatch) return user[0] as any;
      },
    }),
  ],
// [...]

import { genSaltSync, hashSync } from 'bcrypt-ts';
 
export async function createUser(email: string, password: string) {
  const salt = genSaltSync(10);
  const hash = hashSync(password, salt);
 
  return await saveUserToYourDb({ email, password: hash });
}