To recreate, setup shadcn project: npx create-next-app@latest my-app --typescript --tailwind --eslint

npx shadcn-ui@latest init

Install next-auth

npm install next-auth

Create app/api/auth/[...nextauth]/route.ts and copy content from here

Create lib/auth-options.ts and copy content from here

Create next-auth.d.ts and copy content from here

Create components/ui/next-auth-provider.tsx and copy content from here

Add next-auth provider to layout.tsx: <NextAuthProvider>{children}</NextAuthProvider

Set your project's .env.local file to include the following:

SUMMON_CLIENT_ID SUMMON_CLIENT_SECRET

NEXTAUTH_URL -- your domain NEXTAUTH_SECRET -- your custom secret

Deploy to vercel and test

vercel