anchor.diff:  }
   
   Future<T> withClientFromUserCredentials<T>(
  -    List<String> scopes, Future<T> Function(http.Client) action) async {
  +    List<String> scopes, Future<T> Function(AuthClient) action) async {
     final client = IOClient();
   
     final credentials = await _credentials(client, scopes);
  
positive.code: 
  Future<T> withClientFromDefaultCredentials<T>(
    List<String> scopes,
    Future<T> Function(http.Client) action,
  ) async {
    final client = await clientViaApplicationDefaultCredentials(
      scopes: scopes,
  
negative.code: 
  import 'package:_discoveryapis_commons/_discoveryapis_commons.dart';
  import 'package:googleapis_auth/auth_io.dart';
  import 'package:http/io_client.dart';
  import 'package:yaml/yaml.dart';
  
  