docs(pg-adapter): add unique and foreign key constraints to the PG adapter schema

docs/pages/getting-started/adapters/pg.mdx

@@ -202,19 +202,21 @@ The SQL schema for the tables used by this adapter is as follows. Learn more abo
 doc page on [Database Models](/guides/creating-a-database-adapter).
 
 ```sql
-CREATE TABLE verification_token
+CREATE TABLE users
 (
-  identifier TEXT NOT NULL,
-  expires TIMESTAMPTZ NOT NULL,
-  token TEXT NOT NULL,
+  id SERIAL,
+  name VARCHAR(255),
+  email VARCHAR(255) UNIQUE,
+  "emailVerified" TIMESTAMPTZ,
+  image TEXT,
 
-  PRIMARY KEY (identifier, token)
+  PRIMARY KEY (id)
 );
 
 CREATE TABLE accounts
 (
   id SERIAL,
-  "userId" INTEGER NOT NULL,
+  "userId" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
   type VARCHAR(255) NOT NULL,
   provider VARCHAR(255) NOT NULL,
   "providerAccountId" VARCHAR(255) NOT NULL,
@@ -232,22 +234,20 @@ CREATE TABLE accounts
 CREATE TABLE sessions
 (
   id SERIAL,
-  "userId" INTEGER NOT NULL,
+  "userId" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
   expires TIMESTAMPTZ NOT NULL,
-  "sessionToken" VARCHAR(255) NOT NULL,
+  "sessionToken" VARCHAR(255) UNIQUE NOT NULL,
 
   PRIMARY KEY (id)
 );
 
-CREATE TABLE users
+CREATE TABLE verification_token
 (
-  id SERIAL,
-  name VARCHAR(255),
-  email VARCHAR(255),
-  "emailVerified" TIMESTAMPTZ,
-  image TEXT,
+  identifier TEXT NOT NULL,
+  expires TIMESTAMPTZ NOT NULL,
+  token TEXT NOT NULL,
 
-  PRIMARY KEY (id)
+  PRIMARY KEY (identifier, token)
 );
 
 ```

docs/pages/getting-started/providers/apple.mdx

@@ -10,7 +10,7 @@ import { Code } from "@/components/Code"
 - Sign in with Apple [REST API](https://developer.apple.com/documentation/sign_in_with_apple/sign_in_with_apple_rest_api)
 - [How to retrieve](https://developer.apple.com/documentation/sign_in_with_apple/sign_in_with_apple_rest_api/authenticating_users_with_sign_in_with_apple#3383773) the user's information from Apple ID servers
 
-> **_NOTE:_**  Apple currently does not support [RedirectProxyUrl](https://github.com/nextauthjs/next-auth/blob/3ec06842682a31e53fceabca701a362abda1e7dd/packages/core/src/lib/utils/providers.ts#L48) usage.
+> **_NOTE:_** Apple currently does not support [RedirectProxyUrl](https://github.com/nextauthjs/next-auth/blob/3ec06842682a31e53fceabca701a362abda1e7dd/packages/core/src/lib/utils/providers.ts#L48) usage.
 
 ## Setup
 

packages/adapter-pg/schema.sql

@@ -1,18 +1,20 @@
 \set ON_ERROR_STOP true
 
-CREATE TABLE verification_token
+CREATE TABLE users
 (
-  identifier TEXT NOT NULL,
-  expires TIMESTAMPTZ NOT NULL,
-  token TEXT NOT NULL,
-
-  PRIMARY KEY (identifier, token)
+  id SERIAL,
+  name VARCHAR(255),
+  email VARCHAR(255) UNIQUE,
+  "emailVerified" TIMESTAMPTZ,
+  image TEXT,
+
+  PRIMARY KEY (id)
 );
 
 CREATE TABLE accounts
 (
   id SERIAL,
-  "userId" INTEGER NOT NULL,
+  "userId" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
   type VARCHAR(255) NOT NULL,
   provider VARCHAR(255) NOT NULL,
   "providerAccountId" VARCHAR(255) NOT NULL,
@@ -23,27 +25,25 @@ CREATE TABLE accounts
   scope TEXT,
   session_state TEXT,
   token_type TEXT,
-
+ 
   PRIMARY KEY (id)
 );
-
+ 
 CREATE TABLE sessions
 (
   id SERIAL,
-  "userId" INTEGER NOT NULL,
+  "userId" INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
   expires TIMESTAMPTZ NOT NULL,
-  "sessionToken" VARCHAR(255) NOT NULL,
-
+  "sessionToken" VARCHAR(255) UNIQUE NOT NULL,
+ 
   PRIMARY KEY (id)
 );
 
-CREATE TABLE users
+CREATE TABLE verification_token
 (
-  id SERIAL,
-  name VARCHAR(255),
-  email VARCHAR(255),
-  "emailVerified" TIMESTAMPTZ,
-  image TEXT,
-
-  PRIMARY KEY (id)
+  identifier TEXT NOT NULL,
+  expires TIMESTAMPTZ NOT NULL,
+  token TEXT NOT NULL,
+
+  PRIMARY KEY (identifier, token)
 );