错误信息为; The operator [] isn't defined for 'Future<Map<String,Object>> Function(String)' 这是有错误的方法; Futureopenid', 'profile', 'offline_access'],
promptValues: ['login']
CircularProgressIndicator(),) ),
); } 但是我得到了这个错误: Error: The operator '[]' isn't defined for the class 'Map<String, dynamic> Function()'- 'Map' is from 'dart:core'.