messenger method
Implementation
void messenger(BuildContext context, String message) {
showDialog(
context: context,
builder: (ctx) {
return AlertDialog(
title: const Text('An Error Occur'),
content: Text(message),
actions: [
TextButton(
onPressed: () {
Navigator.of(context).pop();
},
child: const Text('Close'),
),
],
);
},
);
}