如何在flutter中使用http post请求进行手机认证？

dependencies:
  http: ^0.13.3

import 'package:http/http.dart' as http;

Future<void> authenticatePhone() async {
  var url = 'https://example.com/api/authenticate'; // 替换为实际的认证API地址

  var response = await http.post(
    Uri.parse(url),
    body: {
      'phone': '1234567890', // 替换为实际的手机号码
    },
  );

  if (response.statusCode == 200) {
    // 认证成功
    print('Phone authentication successful');
  } else {
    // 认证失败
    print('Phone authentication failed');
  }
}

FlatButton(
  onPressed: () {
    authenticatePhone();
  },
  child: Text('Authenticate Phone'),
),