JSON Error

[ChedidJM]

Hello, I am running the following code:

import requests
import json

url_base = ("https://api.developer.deutsche-boerse.com/prod/prisma-margin-estimator-2-0/2.0.0/")
api_header = {"X-DBP-APIKEY": 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'}

etd = {'line_no': 1, 'product_id': 'A2CR', 'maturity': 202112, 'net_ls_balance': 1}

results = requests.post(url_base + 'estimator',
headers = api_header,
json = {'portfolio_components':[
{'type': 'etd_portfolio', 'etd_portfolio': [etd]},
],
'clearing_currency': 'EUR'})

results.json()

print('Example of margin output:')
print(json.dumps(results['portfolio_margin'], indent=4, sort_keys=True))

The response for the post request is <Response [403]> and I get this error:

Traceback (most recent call last):
File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\simplejson\scanner.py", line 37, in _scan_once
nextchar = string[idx]
IndexError: string index out of range

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "g:\My Drive\Melanion\Jean Marc\MarginsGit\SSDF_Margins_Parser_API.py", line 52, in
results.json()
File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\requests\models.py", line 898, in json
return complexjson.loads(self.text, **kwargs)
File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\simplejson_init_.py", line 525, in loads
return _default_decoder.decode(s)
File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\simplejson\decoder.py", line 370, in decode
obj, end = self.raw_decode(s)
File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\simplejson\decoder.py", line 400, in raw_decode
return self.scan_once(s, idx=_w(s, idx).end())
File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\simplejson\scanner.py", line 79, in scan_once
return _scan_once(string, idx)
File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\simplejson\scanner.py", line 39, in _scan_once
raise JSONDecodeError(errmsg, string, idx)
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)