anchor.diff:  						F(F,T)
   			end,
   		Locale = F2(F2, Characteristic),
  -		case mod_auth:add_user(ID, Password, [{locale, Locale}] , Port, Directory) of
  +		LastModified = {erlang:system_time(milli_seconds),
  +				erlang:unique_integer([positive])},
  +		case mod_auth:add_user(ID, Password, [{locale, Locale},
  +				{last_modified, LastModified}] , Port, Directory) of
   			true ->
   				case mod_auth:add_group_member(Group, ID, Port, Directory) of
   					true ->
  
positive.code: 						RespObj = [{"id", ID}, {"href", Location}, {"characteristic", Char}],
  						JsonObj  = {struct, RespObj},
  						Body = mochijson:encode(JsonObj),
  						Headers = [{location, Location}],
  						{ok, Headers, Body}
  				end;
  			{error, _Reason} ->
  				{error, 400}
  		end
  	catch
  
negative.code: 		false ->
  			exit(not_found)
  	end.
  
  -spec etag(V1) -> V2
  	when
  		V1 :: string() | {N1, N2},
  		V2 :: {N1, N2} | string(),
  		N1 :: integer(),
  		N2 :: integer().
  %% @doc Generate a tuple with 2 integers from Etag string
  %% value or vice versa.
  %% @hidden
  etag(V) when is_list(V) ->
  	[TS, N] = string:tokens(V, "-"),
  	{list_to_integer(TS), list_to_integer(N)};
  etag(V) when is_tuple(V) ->
  	{TS, N} = V,
  	integer_to_list(TS) ++ "-" ++ integer_to_list(N).
  
  