fetch request doesn't work in backend

Trying to make a request to this resource: https://crowdcleaning.space/cc1c/ru_RU/odata/standard.odata/?$format=application/json

When i am doing it in browser, everything works fine.
Get a response from a server.

But there is an issue, when i do it in backend.

import {fetch} from 'wix-fetch'; 

// ...
export async function callback2() {
fetch("https://crowdcleaning.space/cc1c/ru_RU/odata/standard.odata/?$format=application/json",
{ "method": "GET",
  "headers": {
  "user": 'xxxxxxxx',
  "password":'xxxxxx',
  }
})
  .then( (httpResponse) => {
    if (httpResponse.ok) {
      return httpResponse.json();
    }
    else {
      return Promise.reject("Fetch did not succeed");
    }
  } )
  .catch( (err) => {
    console.log(err);
  } );
  }

Get this result testing code above:

Can anybody give me an advice how to fix this issue?

You’re missing a return:

//..
return fetch("https://crowdcleaning.space/cc1c/ru_RU/odata/standard.odata/?$format=application/json", 
//...