Login to get session token

try:
data = smartapi.generateSession(client_id, pwd, totp_code)
refresh_token = data['data']['refreshToken']
access_token = data['data']['jwtToken']
feed_token = smartapi.getfeedToken()
print("Login Successful. Access Token:", access_token)

except Exception as e:
print("Login Failed:", e)

stock_symbol_token_NIFTY = '99926000' # NIFTY token for NSE
exchange_NIFTY = 'NSE'
trading_symbol_NIFTY = 'NIFTY'

stock_data_NIFTY = smartapi.ltpData(exchange_NIFTY, trading_symbol_NIFTY, stock_symbol_token_NIFTY)

print(stock_data_NIFTY['data']['ltp'])

I am getting the below error.. I have seen the topic related to RateLimit (https://smartapi.angelbroking.com/docs/RateLimit)... I tried to keep the request within the limit but still I am getting the error....

DataException: Couldn't parse the JSON response received from the server: b'Access denied because of exceeding access rate'