I have activated TOTP today. I am getting Error: Invalid totp and getting following responce - Response: {'status': False, 'message': 'Invalid totp', 'errorcode': 'AB1050', 'data': None}

my code is as follows
from SmartApi import SmartConnect
import os
from pyotp import TOTP

key_path = r"C:\Users\admin"
os.chdir(key_path)

key_secret = open("key.txt","r").read().split()

obj=SmartConnect(api_key=key_secret[0])
data = obj.generateSession(key_secret[2],key_secret[3],TOTP(key_secret[4]).now())

it shows all other parameters correct in responce