Use new error type & log in session close

[anagha-ks]

Description

For CloseSession API:

• Update it to return the newly defined error type (#132)
• Log the request, error/success response are logged in a structured format (#133)

Category

Implementation Task

Relevant issue

Relates to #132, #133

Testing

All tests should pass

Steps to run the tests

Checklist

• [x] Name is added to the NOTICE file, if it is not present already.
• [x] Changes are rebased onto the target branch.