No material widget found textfield widgets require a material widget ancestor
Error states that TextField widgets require a Material widget ancestor. Simply wrapping your whole loginWidget into Scaffold will solve the problem.
Widget LoginPage() { return new Scaffold(body: *your whole code*)}
Just wrap your widget with Material like this:
@overrideWidget build(BuildContext context) { return Material( child: YourAwesomeWidget(),}
Since most of the widget asks for material widget as their parent widget
its a good practice you should use Material() or Scaffold() widget on top of the widget tree and then continue your code.
@overrideWidget build(BuildContext context) { return Material( child: body(),}OR
@overrideWidget build(BuildContext context) { return Scaffold( child: body(),}