Shows how to work with stateful HTTP connections.
HttpClient relies on
UserTokenHandler interface to determine if the given execution context is user specific
or not. The token object returned by this handler is expected to uniquely identify the current user if the context is
user specific or to be null if the context does not contain any resources or details specific to the current user.
The user token will be used to ensure that user specific resources will not be shared with or reused by other users.
More
information.