TextFormField( controller: _emailController, autovalidateMode: AutovalidateMode.onUserInteraction, validator: (input) => input!.validateEmail() ? null : "Please enter valid email!!", decoration: InputDecoration( enabledBorder: const OutlineInputBorder( borderRadius: BorderRadius.all(Radius.circular(12.0)), borderSide: BorderSide(color: Colors.transparent, width: 2), ), focusedBorder: const OutlineInputBorder( borderRadius: BorderRadius.all(Radius.circular(10.0)), borderSide: BorderSide(color: Colors.transparent), ), border: InputBorder.none, filled: true, // prefixIcon: const Icon(Icons.mail), hintStyle: TextStyle(color: Colors.grey800), hintText: "Enter your Email Address", fillColor: Colors.grey200), ),