inserida a fonte, e criada a tela de login_screen.dart

lib/widgets/buttom_custom.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+class ButtonCustom extends StatelessWidget{
+  final VoidCallback onPressed;
+  final String text;
+  final double size;
+  final Color colorButton;
+  final Color colorText;
+  final Color colorBorder;
+  final widthCustom;
+  final heightCustom;
+
+ButtonCustom({
+    required this.onPressed,
+    required this.text,
+    required this.size,
+    required this.colorButton,
+    required this.colorText,
+    required this.colorBorder,
+    this.widthCustom = 1.0,
+    this.heightCustom = 1.0
+});
+  @override
+  Widget build (BuildContext context) {
+    double width =MediaQuery.of(context).size.width;
+    double height =MediaQuery.of(context).size.height;
+
+    return ElevatedButton(
+      style: ElevatedButton.styleFrom(
+        primary: colorButton,
+        minimumSize: Size(width*widthCustom! , height*heightCustom!),
+        side:  BorderSide(width: 2,color : colorBorder,),
+      ),
+      onPressed: onPressed,
+      child: Text(text,
+        style: TextStyle(
+          color: colorText,
+          fontSize: size,
+            fontWeight: FontWeight.bold
+        ),
+      ) ,
+    );
+  }
+
+}

lib/widgets/input_text.dart

@@ -0,0 +1,84 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import '../utils/colors.dart';
+
+class InputText extends StatelessWidget {
+  bool obscure;
+  var controller;
+  double fontSize;
+  String title;
+  double width;
+  TextInputType textInputType;
+  int maxLines;
+  Color colorBorder;
+  var onChanged;
+  bool enable;
+  List<TextInputFormatter> inputFormatters;
+
+  InputText({
+    required this.controller,
+    required this.width,
+    this.obscure = false,
+    this.fontSize = 15.0,
+    this.title = '',
+    this.textInputType = TextInputType.text,
+    this.maxLines = 1,
+    this.colorBorder = PaletteColors.grey,
+    this.onChanged = null,
+    this.enable = true,
+    required this.inputFormatters
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        Container(
+            width: width,
+            child: Text(title,style: TextStyle(fontWeight: FontWeight.bold,fontFamily: 'Nunito'),)
+        ),
+        Container(
+          color:PaletteColors.greyInput,
+          width: width,
+          margin: EdgeInsets.only(bottom: 5),
+          child: TextFormField(
+            inputFormatters: inputFormatters,
+            keyboardType: textInputType,
+            maxLines: maxLines,
+            onChanged: onChanged,
+            obscureText: this.obscure,
+            controller: this.controller,
+            enabled: enable,
+            style: TextStyle(
+              color: Colors.black,
+              fontSize: this.fontSize,
+              fontFamily: 'Nunito'
+            ),
+            decoration: InputDecoration(
+              border: OutlineInputBorder(
+                borderSide: BorderSide(width: 1,color: colorBorder)
+              ),
+              focusedBorder: OutlineInputBorder(
+                borderSide: BorderSide(width: 1, color: colorBorder),
+                borderRadius: BorderRadius.circular(3),
+              ),
+              enabledBorder: OutlineInputBorder(
+                borderSide: BorderSide(width: 1, color: colorBorder),
+                borderRadius: BorderRadius.circular(3),
+              ),
+              disabledBorder: OutlineInputBorder(
+                borderSide: BorderSide(width: 1, color: colorBorder),
+                borderRadius: BorderRadius.circular(3),
+              ),
+              hintStyle: TextStyle(
+                color: Colors.black,
+                fontSize: this.fontSize,
+              )
+            )
+          ),
+        ),
+      ],
+    );
+  }
+}

lib/widgets/snackBars.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+
+void showSnackBar(BuildContext context, String text,Color colors){
+
+  final snackbar = SnackBar(
+    backgroundColor: colors,
+    content: Row(
+      children: [
+        Icon(Icons.info_outline,color: Colors.white),
+        SizedBox(width: 20),
+        Expanded(
+          child: Text(text,
+            style: TextStyle(fontSize: 16),),
+        ),
+      ],
+    ),
+  );
+
+  ScaffoldMessenger.of(context).showSnackBar(snackbar);
+}