code: def getAccountNames(store, protocol=None):
      
      return ((meth.localpart, meth.domain) for meth
                  in getLoginMethods(store, protocol))
docs: Retrieve account name information about the given database.
  
      @param store: An Axiom Store representing a user account.  It must
      have been opened through the store which contains its account
      information.
  
      @return: A generator of two-tuples of (username, domain) which
      refer to the given store.