The instance member 'context' can't be accessed in an initializer. BuildContext Flutter

Question

I'm, trying to make Slider Screen, but it shows me a red line in context. I'm using SDK 2.7.0, I don't know if I need to change the slider. Could you please help me? title: getTranslated(context, 'wel_title1'), Red line: (context).

class IntroSliderScreen extends StatefulWidget {
  @override
  _GettingStartedScreenState createState() => _GettingStartedScreenState();
}

class _GettingStartedScreenState extends State<IntroSliderScreen>
    with TickerProviderStateMixin {
  PageController pageController = PageController();

  double count = 0.00;

  List<Slide> slideList = [
    Slide(
      imageUrl: 'assets/images/uptodate_intro.png',
      title: getTranslated(context, 'wel_title1'),
      description: getTranslated(context, 'wel_des1'),
    ),
    Slide(
      imageUrl: 'assets/images/bookmark_share.png',
      title: getTranslated(context, 'wel_title2'),
      description: getTranslated(context, 'wel_des2'),
    ),
    Slide(
      imageUrl: 'assets/images/new_categories.png',
      title: getTranslated(context, 'wel_title3'),
      description: getTranslated(context, 'wel_des3'),
    ),
  ];

  @override
  void initState() {
    super.initState();
    onPageChanged(0);
  }