auth
auth/profile.go
Implement ClientStore in Memstore. Add the ClientStore interface implementation to Memstore. Change the ClientStore interface's UpdateClient function to take a new type, ClientChange, rather than enumerating the arguments in the function signature, which is a much cleaner interface. Add tests for the successful (works-as-intended) scenarios involving ClientStores. Ignore UpdateClient for now--I want to do tests that test every combination of ClientUpdate attributes being specified, to be sure that only the attributes specified are updated and that all the attributes specified are updated.