Initial app scaffolding, including flutter files, 3 screens, and 1 widget

lib/screens/authentication.dart

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+import 'package:flutter/cupertino.dart';
+
+class Authentication extends StatefulWidget {
+  @override
+  _AuthenticationState createState() => _AuthenticationState();
+}
+
+class _AuthenticationState extends State<Authentication> {
+  static const String _masterpass = 'hunter#2';
+  bool _invalid = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      child: Container(
+        margin: const EdgeInsets.symmetric(horizontal: 50.0),
+        child: Column(
+          children: _buildColumnChildren(context),
+        ),
+      ),
+    );
+  }
+
+  List<Widget> _buildColumnChildren(BuildContext context) {
+    final children = [
+      const Spacer(flex: 4),
+      const Flexible(child: Text('Master password:')),
+      Flexible(
+        child: Container(
+          padding: const EdgeInsets.symmetric(vertical: 5.0),
+          child: CupertinoTextField(
+            decoration: BoxDecoration(
+              border: Border.all(color: CupertinoColors.black),
+              borderRadius: const BorderRadius.all(Radius.circular(5.0)),
+            ),
+            clearButtonMode: OverlayVisibilityMode.editing,
+            textAlign: TextAlign.center,
+            onSubmitted: _makeTextFieldOnSubmittedHandler(context),
+            obscureText: true,
+          ),
+        ),
+      ),
+    ];
+
+    if (_invalid) {
+      children.add(const Flexible(
+        child: Text(
+          'invalid masterpass',
+          style: TextStyle(color: CupertinoColors.destructiveRed),
+        ),
+      ));
+      children.add(const Spacer(flex: 2));
+    } else {
+      children.add(const Spacer(flex: 3));
+    }
+
+    return children;
+  }
+
+  ValueChanged<String> _makeTextFieldOnSubmittedHandler(BuildContext context) {
+    return (String pass) {
+      if (pass != _masterpass) {
+        this.setState(() {
+          _invalid = true;
+        });
+        return;
+      }
+
+      Navigator.of(context).pushReplacementNamed('/home');
+    };
+  }
+}

lib/screens/credentials.dart

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+import 'package:flutter/cupertino.dart';
+
+import '../widgets/tappable_text_list.dart';
+
+class Credentials extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      child: TappableTextList(tappableText: _buildTappableText(context)),
+      navigationBar: const CupertinoNavigationBar(middle: Text('Credentials')),
+    );
+  }
+
+  static Map<String, GestureTapCallback> _buildTappableText(
+      BuildContext context) {
+    var handleOnTap = () {};
+
+    Map<String, GestureTapCallback> tappableText = {
+      'm@mjfs.us': handleOnTap,
+      'm-mjfs': handleOnTap,
+      'mitchelljfsimon@gmail.com-mitchelljfsimon': handleOnTap,
+    };
+
+    return tappableText;
+  }
+}

lib/screens/home.dart

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+import 'package:flutter/cupertino.dart';
+// import 'package:provider/provider.dart';
+
+// import '../types/abstracts.dart';
+// import '../types/credential.dart';
+import '../widgets/tappable_text_list.dart';
+
+class Home extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      child: TappableTextList(tappableText: _buildTappableText(context)),
+      navigationBar:
+          const CupertinoNavigationBar(middle: Text('Credentials Hosts')),
+    );
+  }
+
+  static Map<String, GestureTapCallback> _buildTappableText(
+      BuildContext context) {
+    var handleOnTap = () => Navigator.of(context).pushNamed('/credentials');
+    Map<String, GestureTapCallback> tappableText = {
+      "google.com": handleOnTap,
+      "amazon.com": handleOnTap,
+      "linkedin.com": handleOnTap,
+    };
+
+    return tappableText;
+  }
+}