anchor.diff:  				end
   		end
   	catch
  -		_:_Reason ->
  +		_:_Reason1 ->
   			{error, 404}
   	end;
   get_usage("acct-" ++ _ = Id, [] = _Query) ->
  
positive.code: 		TS = list_to_integer(TimeStamp),
  		N = list_to_integer(Serial),
  		case ocs_log:auth_query(start, TS, TS, '_', '_', '_', '_') of
  			{error, _} ->
  				{error, 500};
  			{_, Events} ->
  				case lists:keyfind(N, 2, Events) of
  					Event when is_tuple(Event) ->
  						{struct, Attr} = usage_aaa_auth(Event, []),
  
negative.code: 		TS = list_to_integer(TimeStamp),
  		N = list_to_integer(Serial),
  		case ocs_log:acct_query(start, TS, TS, '_', '_', '_') of
  			{error, _Reason} ->
  				{error, 500};
  			{_, Events} ->
  				case lists:keyfind(N, 2, Events) of
  