update user delete account to get errors

As a jobseeker I want to delete my profile So that I no longer exist at CareerBuilder - https://careerbuilder.mingle.thoughtworks.com/projects/engagement__new_/cards/139

Api wrapper already exists but does not handle error message, the delete method just return true or false. Returns now a MetaValues object
doing it this way will add this `attr_reader` to all current instances and future instances of the `Cb::Utils::MetaValues` class until the application is restarted. maybe not the best thing?