How to detect when access token has expired?

[Whip]

I want to send an email when the access token expires. I see there's a method in kiteconnect.php setSessionExpiryHook but I'm not sure how to use that. Can you post an example?

[VarunAgw]

Too late to answer, but it expires every morning. Alternatively, you can just send get profile request every 5 minutes. If it fails, it means the token is expired.