[firebase auth/admin-restricted-operation] This operation is restricted to administrators only.

[adelabdelstar]

import 'package:firebase_auth/firebase_auth.dart';

class AuthService {
//final FirebaseAuth _auth = FirebaseAuth.instance;

Future signInAnon() async {
try {
// UserCredential result = await _auth.signInAnonymously();
UserCredential result = await FirebaseAuth.instance.signInAnonymously();
User user = result.user;
return user;
} catch (e) {
print(e.toString());
return null;
}
}
}

import 'package:flutter/material.dart';
import 'package:newfirebase/services/auth.dart';

class SignIn extends StatefulWidget {
@OverRide
_SignInState createState() => _SignInState();
}

class _SignInState extends State {
final AuthService _auth = AuthService();

@OverRide
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.brown[100],
appBar: AppBar(
backgroundColor: Colors.brown[400],
elevation: 0.0,
title: Text('Sign in to My App'),
),
body: Container(
padding: EdgeInsets.symmetric(vertical: 20.0, horizontal: 50.0),
child: RaisedButton(
child: Text('Sign in'),
onPressed: () async {
dynamic result = await _auth.signInAnon();
if (result == null) {
print('error signing in');
} else {
print('signed in');
print(result);
}
},
),
),
);
}
}

[kevmoo]

Please file this issue with the repository for firebase_auth