How to explicity close a kite session for security reasons

Hi ,
I am new to Kite API's and was going through sample Python code.
I see the code to start a session via ( kite.generate_session call )
I am able to get the access token and subsequently fire few additional commands. However I was not sure how to explicitly close the session for security reasons and as a best practice

I did check it on the developer forum for any previous responses, but did not find any.

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