this is my route.ts file inside chat folder of the api folder

import { StreamingTextResponse, CohereStream } from 'ai'

// IMPORTANT! Set the runtime to edge
export const runtime = 'edge'

export async function POST(req: Request) {
  // Extract the `prompt` from the body of the request
  const { prompt } = await req.json()

  const body = JSON.stringify({
    prompt,
    model: 'command-nightly',
    max_tokens: 300,
    stop_sequences: [],
    temperature: 0.9,
    return_likelihoods: 'NONE',
    stream: true
  })

  const response = await fetch('https://api.cohere.ai/v1/generate', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Authorization: `Bearer ${process.env.COHERE_API_KEY}`
    },
    body
  })

  // Extract the text response from the Cohere stream
  const stream = CohereStream(response)

  // Respond with the stream
  return new StreamingTextResponse(stream)
}

this is my folder structure

└── 📁src
    └── 📁app
        └── 📁api
            └── 📁chat
                └── route.ts
            └── 📁create-chat
                └── route.ts
            └── 📁get-messages
                └── route.ts
        └── 📁chat
            └── 📁[chatId]
                └── page.tsx
        └── favicon.ico
        └── globals.css
        └── layout.tsx
        └── page.tsx
        └── 📁sign-in
            └── 📁[[...sign-in]]
                └── page.tsx
        └── 📁sign-up
            └── 📁[[...sign-up]]
                └── page.tsx
    └── 📁components
        └── ChatComponent.tsx
        └── ChatSideBar.tsx
        └── FileUpload.tsx
        └── MessageList.tsx
        └── PDFViewer.tsx
        └── Provider.tsx
        └── 📁ui
            └── button.tsx
            └── input.tsx
    └── 📁lib
        └── 📁db
            └── index.ts
            └── schema.ts
        └── embeddings.ts
        └── pinecone.ts
        └── s3-server.ts
        └── s3.ts
        └── utils.ts
    └── middleware.ts

please help