Always return json response and not error?

src/routes/api/newsletter/+server.ts

@@ -1,6 +1,6 @@
 import { NEWSLETTER_API_TOKEN, NEWSLETTER_LIST_ID } from '$env/static/private'
 import type { RequestHandler } from './$types'
-import { error, json } from '@sveltejs/kit'
+import { json } from '@sveltejs/kit'
 
 export const POST = (async ({ request, fetch }) => {
     const data: { email: string } = await request.json()
@@ -8,34 +8,34 @@ export const POST = (async ({ request, fetch }) => {
 
     // No email
     if (!email) {
-        throw error(400, { message: 'NO_EMAIL' })
+        return json({ message: 'NO_EMAIL' })
     }
     // Invalid email
     if (!email.match(/^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/)) {
-        throw error(400, { message: 'INVALID_EMAIL' })
+        return json({ message: 'INVALID_EMAIL' })
     }
 
-    return json(email)
+    // return json(email)
 
     // Newsletter API request
-    // const req = await fetch(`https://emailoctopus.com/api/1.6/lists/${NEWSLETTER_LIST_ID}/contacts`, {
-    //     method: 'POST',
-    //     headers: { 'Content-Type': 'application/json' },
-    //     body: JSON.stringify({
-    //         api_key: NEWSLETTER_API_TOKEN,
-    //         email_address: email,
-    //     })
-    // })
-    // const res = await req.json()
-    // console.log('server API response:', res)
+    const req = await fetch(`https://emailoctopus.com/api/1.6/lists/${NEWSLETTER_LIST_ID}/contacts`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+            api_key: NEWSLETTER_API_TOKEN,
+            email_address: email,
+        })
+    })
+    const res = await req.json()
+    console.log('server API response:', res)
 
-    // // Other error
-    // if (res && res.status !== 'PENDING') {
-    //     throw error(400, { message: res.error.code })
-    // }
+    // Other error
+    if (res && res.status !== 'PENDING') {
+        return json({ message: res.error.code })
+    }
 
-    // return json({
-    //     success: true,
-    //     message: res.status,
-    // })
+    return json({
+        success: true,
+        message: res.status,
+    })
 }) satisfies RequestHandler