python trade accept not working

[nuck]

 Hi guys, first of all i am sorry about my english. I try some trade offer accept without any library like "communitylink/tradeoffer/<tradeofferid/accept" but response either null or nothing please help me.

There is my code 

def test(trade_id: int):
  with requests.Session() as s:
    s.get(url="https://steamcommunity.com/tradeoffer/"+trade_id+"/accept/")
    sessionid = s.cookies.get("sessionid")
  param = {
    "sessionid": sessionid,
    "serverid": 1,
    "tradeofferid": trade_id
  }
  headers = {
    "referer": "https://steamcommunity.com/tradeoffer/"+trade_id+"/"
  }
  print (sessionid)
  response = requests.post("https://steamcommunity.com/tradeoffer/"+trade_id+"/accept",headers=headers,params=param)
  print (response.text)

test("4765101895")