anchor.diff:  auth_user(Username, Password) ->
       NameIndex = ?ru:gen_index_name(?default_group, users_name),
       {ok, TxId} = pvc:start_transaction(),
  +    lager:info("{~p} ~p", [erlang:phash2(TxId), ?FUNCTION_NAME]),
       {ok, [Val]} = pvc_indices:read_u_index(NameIndex, Username, TxId),
       Result = case Val of
           <<>> ->
  
positive.code:     UsernameIndex = ?ru:gen_index_name(?default_group, users_name),
  
      {ok, TxId} = pvc:start_transaction(),
  
      %% Check that our username is unique
      {ok, [Val]} = pvc_indices:read_u_index(UsernameIndex, Username, TxId),
  
negative.code:     NameIndex = ?ru:gen_index_name(?default_group, regions_name),
  
      {ok, TxId} = pvc:start_transaction(),
      lager:info("{~p} ~p", [erlang:phash2(TxId), ?FUNCTION_NAME]),
      %% Make sure we don't perform blind-writes
      {ok, [<<>>]} = pvc:read_keys(RegionKey, TxId),
      ok = pvc:update_keys({RegionKey, RegionName}, TxId),
  