I’m trying to download ratings data from SensorTower API using Google Apps Script, but I get 401 error.

I can retrieve data using python on my local computer using this simple code

AUTH_TOKEN = 'xxx'
GET_RATINGS_URL = "https://api.sensortower.com:443/v1/ios/review/get_ratings"

payload = {'auth_token': AUTH_TOKEN,
           'country':'US',
           'app_id': '123456789'
           }

product_response = requests.get(GET_RATINGS_URL,params=payload)

but I need to make it work in Google Apps Script. I’ve written this code

AUTH_TOKEN = 'xxx'
GET_RATINGS_URL = "https://api.sensortower.com:443/v1/ios/review/get_ratings"

function callSensortowerAPI(inputURL, authToken) {

  const payload = {"auth_token":authToken,
           "country":"US",
           "app_id":"123456789"                          
           }

  var response = UrlFetchApp.fetch(inputURL,payload)
  var json = response.getContentText()
  var data = JSON.parse(json)
  return data
  }

var rating_data = callSensortowerAPI(GET_RATINGS_URL,AUTH_TOKEN)

which seems to me similar to what’s working in Python. But I get this error

Exception: Request failed for https://api.sensortower.com returned code 401. Truncated server response: {"error":"You need to sign in or sign up before continuing."}

I tried to stringify the payload like this

  var options = {
    "method" : "POST",
    "contentType": "application/json",
    "payload" : JSON.stringify(payload)

var response = UrlFetchApp.fetch(inputURL,options)
  }

but it still returned 401.

When I tried to insert random auth_token in Python, it returned {'error': 'Invalid authentication token.'} so it seems like another issue.

So my main question is why python code is working and Google Apps Script isn’t?