A AlertProvider must be supplied

[rahulmahadik]

I'm trying add in my flutter project
My Code:

@override
 Widget build(BuildContext context) {

....

Alert.toast(context, "My msg",position: ToastPosition.bottom, duration: ToastDuration.long);
...
}

Error:

A AlertProvider must be supplied
I/flutter ( 9175): 'package:easy_alert/easy_alert.dart': Failed assertion: line 90 pos 12: 'manager != null'

[jzoom]

void main() => runApp(new AlertProvider(
child: new YourApp(),
config: new AlertConfig(
ok: "OK text for ok button in AlertDialog",
cancel: "CANCEL text for cancel button in AlertDialog"),
));