public interface UserTokenHandlerA handler for determining 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
nullif 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.
Object getUserToken(HttpContext context)The token object returned by this method is expected to uniquely identify the current user if the context is user specific or to be
nullif it is not.
context- the execution context
- user token that uniquely identifies the user or
nullif the context is not user specific.