createUserWithEmailAndPassword error operation not allowed (firebase auth enabled) - firebase

Question

I'm new with flutter and firebase. I'm trying to use createUserWithEmailAndPassword function for firebase but when I try to implement the code it's an infinite loop. I used debug mode of android studio and it shows me the errors ERROR_OPERATION_NOT_ALLOWED : The given sign-in provider is disabled for this Firebase project. Enable it in the Firebase console, under the sign-in method tab of the Auth section. . It seems to be an errors in the firebase authentification but I already enable the authentification with email and password then I don't understand why there is this issue. I copy-paste the json document and I modified the gradle files too as it is mentionned in the google process.
Thanks for the help.

Answer 1

The error says the given sign-in provider is disabled for this Firebase project
You have to enable email and password options in your firebase project.
See screenshots on how to do that below:
1) Go to the authentication tab after clicking your firebase project
2) Select the Sign-In methods tab
3) Enable sign in with email and password
If you are still getting the error, Try running flutter clean in your project.
I hope this helps

Answer 2

FlatButton(onPressed: () async {
if(_formKey.currentState.validate()) {
setState(() => chargement = true);
AuthResult result = await _auth.createUserWithEmailAndPassword(email: email, password: mdp); //here is the issue
await collectionUser.document(_idUser()).setData({
'idUser' : _idUser(),
'nomComplet' : nomComplet,
'emailUser' : email,
});
if(result == null){
setState(() => chargement = true);
}
}
},
color: Colors.amber,
child: Text("inscription"),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20.0)
),
),