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

And this is my auth.ts

import NextAuth from 'next-auth'; import Credentials from 'next-auth/providers/credentials'; import { authConfig } from './auth.config'; import { sql } from '@vercel/postgres'; import { z } from 'zod'; import type { User } from '@/app/lib/definitions'; import bcrypt from 'bcrypt'; async function getUser(email: string): Promise<User | undefined> { try { const user = await sql<User>SELECT * from USERS where email=${email}; return user.rows[0]; } catch (error) { console.error('Failed to fetch user:', error); throw new Error('Failed to fetch user.'); } } export const { auth, signIn, signOut } = NextAuth({ ...authConfig, providers: [ Credentials({ async authorize(credentials) { const parsedCredentials = z .object({ email: z.string().email(), password: z.string().min(6) }) .safeParse(credentials); if (parsedCredentials.success) { const { email, password } = parsedCredentials.data; const user = await getUser(email); if (!user) return null; const passwordsMatch = await bcrypt.compare(password, user.password); if (passwordsMatch) return user; } console.log('Invalid credentials'); return null; }, }), ], });

Everything was copy pasted from nextjs/learn