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In this updated version, a requests.Session object is created in the class's init method. The session's headers are set with the necessary authorization and content-type information. This session object is then used to make HTTP requests in the update_link, get_links, and user_info methods.Using the session object helps to improve efficiency by reusing the underlying TCP connection for subsequent requests to the same host. This can result in faster performance when making multiple requests to the Bit.ly API.