Widget _buildPhoneField(context) {
    final formBloc = LoginFormProvider.of(context);
    return TextField(
      textAlign: TextAlign.justify,
      style: TextStyle(
          fontSize: 27.0, fontWeight: FontWeight.bold, color:Colors.black),
      keyboardType: TextInputType.phone,
      maxLines: 1,
      maxLength: 9,
      autofocus: false,
      textInputAction: TextInputAction.next,
      onEditingComplete: () => print('onEditingComplete'),
      onChanged: (s) => formBloc.phoneFieldSink.add(s),
      onSubmitted: (s) => print('onSubmitted: $s'),
      decoration: InputDecoration(
          labelText: 'Phone',
          border: OutlineInputBorder(borderRadius: BorderRadius.circular(8.0))),
    );
  }