docs: db hooks improves

docs/content/docs/concepts/database.mdx

@@ -282,9 +282,7 @@ There are two types of hooks you can define:
 ### 1. Before Hook
 
 - **Purpose**: This hook is called before the respective entity (user, session, or account) is created or updated.
-- **Behavior**: 
-  - If the hook returns `false`, the operation will be aborted.
-  - If it returns an object, that object will replace the original data.
+- **Behavior**: If the hook returns `false`, the operation will be aborted. And If it returns an object, that object will replace the original data.
 
 ### 2. After Hook
 
@@ -293,9 +291,11 @@ There are two types of hooks you can define:
 
 **Example Usage: add a `before` hook to the `user` model to split the `name` field into `firstName` and `lastName` fields.**
 
-```typescript
-const hooks: BetterAuthOptions['databaseHooks'] = {
-  user: {
+```typescript title="auth.ts"
+import { betterAuth } from "better-auth";
+
+export const auth = betterAuth({
+   user: {
     create: {
       before: async (user) => {
           return {
@@ -307,13 +307,9 @@ const hooks: BetterAuthOptions['databaseHooks'] = {
     },
     update: {
       after: async (user) => {
-          return {
-              ...user,
-              firstName: user.name.split(" ")[0],
-              lastName: user.name.split(" ")[1]
-          }
+          //perform additional actions, like creating a stripe customer
       },
     },
   },
-};
+})
 ```