Authentication errors should specify if the failure is from portkey's side or the providers

[hargup]

What Happened?

code

const { OpenAI } = require('openai');
const { PORTKEY_GATEWAY_URL, createHeaders } = require('portkey-ai');

const gateway = new OpenAI({
    apiKey: process.env.ANTHROPIC_API_KEY,
    baseURL: PORTKEY_`GATEWAY_URL,
    defaultHeaders: createHeaders({
        provider: "anthropic"
  })
});

async function main(){
  const chatCompletion = await gateway.chat.completions.create({
      messages: [{ role: 'user', content: 'Who are you?' }],
      model: 'claude-3-sonnet-20240229',
  });
  console.log(chatCompletion.data.choices[0].message.content);
}

main();```

This returns a cryptic 401

        return new AuthenticationError(status, error, message, headers);
               ^

AuthenticationError: 401 status code (no body)
at APIError.generate (/Users/harshwork/code/ai-browser-node/node_modules/openai/error.js:48:20)
at OpenAI.makeStatusError (/Users/harshwork/code/ai-browser-node/node_modules/openai/core.js:263:33)
at OpenAI.makeRequest (/Users/harshwork/code/ai-browser-node/node_modules/openai/core.js:306:30)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async main (/Users/harshwork/code/ai-browser-node/form_filler/llm_call_test.js:14:26) {
status: 401,
headers: {
'alt-svc': 'h3=":443"; ma=86400',
'cf-ray': '88102e39cdd3e61a-DEL',
connection: 'keep-alive',
'content-length': '79',
'content-type': 'application/json;charset=UTF-8',
date: 'Thu, 09 May 2024 08:04:47 GMT',
nel: '{"success_fraction":0,"report_to":"cf-nel","max_age":604800}',
'report-to': '{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=rI%2B%2FYX8m2lYsFzF00%2FnKGQVEHEbVc4Jo55rvoaKlwkk1%2BSGljN7dcLlVrO2RjPpSR5v%2Fe3HNW%2BT5%2BTJt0GIFjzbMksfLcAtPsa2lj%2BBo9IEa7D%2F5LUGcdnCFHkvKNQB7"}],"group":"cf-nel","max_age":604800}',
server: 'cloudflare',
vary: 'Accept-Encoding'
},
request_id: undefined,
error: undefined,
code: undefined,
param: undefined,
type: undefined
}

### What Should Have Happened?

Error message should specify if the error is from portkey's side or the providers and if it is running locally or on hosted version.

### Relevant Code Snippet

_No response_

### Your Twitter/LinkedIn

https://twitter.com/hargup13