initDio method Null safety

void initDio()

Implementation

void initDio() {
  String userAgent = 'smh-flutter';
  if (Platform.isAndroid) {
    userAgent += '-android-sdk';
  }
  if (Platform.isIOS) {
    userAgent += '-ios-sdk';
  }

  dio.options.headers = {
    "content-type": 'application/json',
    'accept': '*/*',
    'accept-encoding': 'gzip, deflate, br',
    'connection': 'keep-alive',
    'user-agent': userAgent,
  };
  dio.options.connectTimeout = 30000;
}