Changes to Read a session, refresh its grant, and check the agent

added the optional property agent/error to the response with the 200 status

the success response property const value false was added for the status 401

the success response property const value false was added for the status 403

the success response property const value false was added for the status 404

the success response property const value false was added for the status 409

the success response property const value false was added for the status 429

the success response property const value false was added for the status 500

endpoint added