This service yields the basket for a user who visits the site.
Consider this service to be a stepping stone towards different sorts of information being attached to the logged in user through patterns which are common in frontend technologies. This specific repository will evolve more towards supprting shopping baskets rather than towards the generic applications.
Baskets are stored in their own graph based on the current user. This service maintains the relevant graph with respect to the orders. Information regarding the logged in user is not maintained in this service, but merging the content from the current session to the logged in user can be.