Dart - error when trying to authenticate with mongodb - mongodb

Question

After running:
import 'package:mongo_dart/mongo_dart.dart';
//Create account with given credentials
createAccount(Map<String, String> credentials) async {
Db db = new Db('mongodb://127.0.0.1/exampledb');
await db.open();
await db.authenticate("user", "password");
//TODO: Post credentials into DB
}
I get an error on the Dart server saying:
Unhandled exception:
Uncaught Error: {ok: 0.0, errmsg: auth failed, code: 18}
And a different error comes up up on the mongod server:
2015-09-27T20:04:25.921+0100 I ACCESS [conn1] Failed to authenticate user#exampledb with mechanism MONGODB-CR: AuthenticationFailed MONGODB-CR credentia
ls missing in the user document
The only time when the authentication has succeeded and has allowed me access to the database is when I am using the command prompt.
Example:
$ use exampledb
$ db.auth("user", "password")
How can I make my Dart script gain access to my local mongodb, using the authenticate method?

Answer 1

Fresh update:
Since version 0.2.5 mongo_dart supports SCRAM-SHA-1 authentification mechanism. It used by default in connections to MongoDb 3
Update:
That seems to be rather widespread problem with some drivers, programs e.t.c not supporting yet new authentication mechanism (SCRAM-SHA-1) of mongodb 3.0
By default, mongodb 3.0, do not create credentials in old format (MONGODB-CR) while creating new users.
There is round-about solution, that force mongodb 3.0 and upper version use MONGODB-CR mode while creating users.
Look for example solution at https://jira.mongodb.org/browse/SERVER-17459
As stated in that thread
both new drivers and legacy software work with that solution
Obviously best solution for mongo_dart would be to add implementation of new authentication mode to the driver. Can not give any date, but I think it should be first feature that I can take in consideration as soon as I have some time for mongo_dart.
And obviously it would be great if somebody beat me at that with pull request :)
Original answer
I've reproduced that error in my environment too.
Error appears to be related to changed default authentication mode in version 3.0 of MongoDb. I'll update this answer, when the problem will be resolved

Answer 2

I tried that in my mongodb 4.0.10 and mongo_dart 0.3.6 and the authentication went all right and correct just update your components if you didn't yet and everything will be fine.
PS: I know I am late but hope someone get used from my "Note".