Update code example for deleting a user (#1548)

docs/users/deleting-users.mdx

@@ -20,14 +20,14 @@ To delete users using the Clerk API, you can use the [`deleteUser()`](/docs/refe
 <Tabs type="framework" items={["Next.js", "Node", "cURL"]}>
   <Tab>
     ```ts {{ filename: 'app/api/delete-user/route.ts' }}
-    import { auth, clerkClient } from '@clerk/nextjs/server'
+    import { clerkClient } from '@clerk/nextjs/server'
     import { NextResponse } from 'next/server'
 
     export async function DELETE() {
-      const { userId } = auth()
+      const userId = 'user_123'
 
       try {
-        await clerkClient.users.deleteUser(userId)
+        await clerkClient().users.deleteUser(userId)
         return NextResponse.json({ message: 'User deleted' })
       } catch (error) {
         console.log(error)
@@ -56,8 +56,8 @@ To delete users using the Clerk API, you can use the [`deleteUser()`](/docs/refe
   </Tab>
 
   <Tab>
-    ```bash {{ filename: 'curl.sh' }}
-    curl -XDELETE -H 'Authorization: CLERK_SECRET_KEY' 'https://api.clerk.com/v1/users/{user_id}'
+    ```bash {{ filename: 'terminal' }}
+    curl 'https://api.clerk.com/v1/users/{user_id}' -X DELETE -H 'Authorization:Bearer {{secret}}' -H 'Content-Type:application/json'
     ```
   </Tab>
 </Tabs>