Hi,

My application has been integrated with Zoho CRM with the API.

I created the client, and used the self client option to generate a grant token.

Token persistence is set to file.

 I generate the access and refresh tokens within the time limit selected from the grant token.

They are persisted to the set file.

Requests all work fine.

However after hour or so they no longer work. And I have to get a new grant token to generate new access / refresh tokens to get it to work again.

From the documentation, the SDK should be renewing this tokens automatically? 

Any ideas!?