Firebase setAuthCookies in order to use client sdk does not work ON nextjs functions

[Darren120]

NEXTjs /api/upload code

import type { NextApiRequest, NextApiResponse } from 'next'
import LZString from 'lz-string';
import firebase from 'firebase';
import initAuth from '../../next-firebase-config/init-auth';

initAuth()
import { getFirebaseAdmin, setAuthCookies } from 'next-firebase-auth'
export default async function handler(
  req: NextApiRequest,
  res: any
) 
{
 
  try {
    await setAuthCookies(req,res)
    var storageRef = firebase.storage().ref().child("aspissstest");
    let c = await storageRef.putString('123')
    res.status(200).json({ name: 'John Doe2' })
  } catch (e) {
    // eslint-disable-next-line no-console
    console.error(e)
    return res.status(500).json({ error: e })
  }
  return res.status(200).json({ status: true })
}

Frontend code : 

let token = await authUser.getIdToken()
                               if (token == null ) {console.log("uid is NULL"); return}
                               let q = await axios({
                                    method: 'GET',
                                    url: "http://localhost:3000/api/upload",
                                    headers: {
                                      'Authorization': "Bearer " + token,
                                    
                                    }})
                                console.log(q)

ERROR:

  errorInfo: {
    code: 'auth/argument-error',
    message: 'Decoding Firebase ID token failed. Make sure you passed the entire string JWT which represents an ID token. See https://firebase.google.com/docs/auth/admin/verify-id-tokens for details on how to retrieve an ID token.'
  },
  codePrefix: 'auth'
}

What I have tried: Literally pasting the idtoken as a string.

[Darren120]

DELETING 'Bearer ' gets new error

{
  "error": {
    "code": 403,
    "message": "Permission denied."
  }
}] {
  code: 'storage/unauthorized',
  customData: {
    serverResponse: '{\n' +
      '  "error": {\n' +
      '    "code": 403,\n' +
      '    "message": "Permission denied."\n' +
      '  }\n' +
      '}'
  },
  _baseMessage: "Firebase Storage: User does not have permission to access 'aspissstest'. (storage/unauthorized)"
}