Error while downloading historical data

from datetime import datetime, timedelta
from kiteconnect import KiteConnect
from kiteconnect import exceptions
import pdb
import pandas as pd

ak = "aadfafg"
asecret = "hz9ugaafga1qew1ojyivj8mt7v2rz3l80wjlaz"
#request_token = "uXkU3WadfafAfag91cS7f9l0FUVJQVu4J6YRS"
access_token = "Z3jyFpJw8dGddadfasdfg7pLy48VnVmRAS35Lr0Z"

kite = KiteConnect(api_key=ak)
#data = kite.generate_session(request_token,api_secret=asecret)
kite.set_access_token(access_token)

trd_portfolio = {"HDFCBANK":{'token':341249}}

token = 341249
to_date = datetime.now()
from_date = to_date - timedelta(days=30)
interval="15minute"

records = kite.historical_data(token,from_date,to_date,interval)
df = pd.DataFrame(records)
df.to_excel("zerodhastocks.xlsx")
pdb.set_trace()

guys i am running above code to get historical data but getting below error.

kiteconnect.exceptions.PermissionException: Insufficient permission for that call.