import requests
url = 'https://www.pathofexile.com/character-window/get-stash-items?league=Standard&tabs=0&tabIndex=1&accountName=BlaBlaAccount'
payload = {'POESESSID' : 'dqwdf9fwe9fwqe09fi900990'}
response = requests.post(url, cookies=payload)
print(response.status_code)
if response.status_code == 200:
    data = response.json()
    print(data)