expose api key and base url

Author: jordanstephens

samples/nextjs-openai/ui/src/app/api/chat/route.ts

@@ -1,8 +1,14 @@
-import { openai } from "@ai-sdk/openai";
+import { createOpenAI } from "@ai-sdk/openai";
 import { streamText } from "ai";
 
 const system = "You are a helpful and knowledgeable expert about cloud computing. You are funny, and love to help others, and speak in short messages.";
 
+const openai = createOpenAI({
+  baseURL: "https://api.openai.com/v1",
+  apiKey: process.env.OPENAI_API_KEY,
+})
+
+
 export async function POST(req: Request) {
   const { messages } = await req.json();
   const result = streamText({