move into function

src/app/api/chat/route.ts

@@ -1,13 +1,12 @@
 import OpenAI from 'openai';
 import { OpenAIStream, StreamingTextResponse } from 'ai';
 
-const openai = new OpenAI({
-    apiKey: process.env.OPENAI_API_KEY,
-});
-
 export const runtime = 'edge';
 
 export async function POST(req: Request) {
+    const openai = new OpenAI({
+      apiKey: process.env.OPENAI_API_KEY,
+    });
     const { messages, data } = await req.json();
     const vectorStoreResultsString = data.vectorStoreResults;