Match NextAuth config with the course (#221)

* Create .env.local.example

* changes

* Update page.tsx

* Update definitions.ts

* wip signin validation

* fix validation in action

* fix

* remove import

* change

* update

* change

* added button state

* improved UI

---------

Co-authored-by: Steven Tey <stevensteel97@gmail.com>

dashboard/15-final/scripts/seed.js

@@ -12,7 +12,7 @@ async function seedUsers() {
     // Create the "invoices" table if it doesn't exist
     const createTable = await sql`
       CREATE TABLE IF NOT EXISTS users (
-        id SERIAL PRIMARY KEY,
+        id UUID DEFAULT uuid_generate_v4() PRIMARY KEY,
         name VARCHAR(255) NOT NULL,
         email TEXT NOT NULL UNIQUE,
         password TEXT NOT NULL