I need to add email/password authentication with flutter and firebase - firebase

Question

I have a Google authentication working just fine, and I need to create another signUp method (with email/and password), so what are the best approaches for implementing this signUp method?
I tried to create a user and it worked. But then I can't navigate to my other pages!
I couldn't find any good blog posts or documentation. Note that when the user signs up I also need to add them in firebase Database.

Answer 1

Try something like this:
emailPasswordLogin(BuildContext context, String email, String password)async{
try {
AuthResult authResult = await _auth.signInWithEmailAndPassword(
email: email, password: password);
FirebaseUser user = authResult.user;
} catch (ex) {
print("Code: " + ex.code);
switch (ex.code) {
case 'ERROR_USER_NOT_FOUND':
{
await createUser(email, password, context);
}
case 'ERROR_WRONG_PASSWORD':
print("wrong password);
break;
case 'ERROR_INVALID_EMAIL':
print("invalid email")
break;
case 'ERROR_OPERATION_NOT_ALLOWED':
print("Login Method not defined")
break;
case 'ERROR_WEAK_PASSWORD':
print("weak password")
break;
default:
print('Case ${ex.message} is not yet implemented');
}
return;
}
storeData(user, context);
}
storeData(FirebaseUser user, BuildContext context) async {
_database = new FirebaseDatabase();
await _database
.reference()
.child('user')
.push().set(<dynamic, dynamic> async{
"email": user.email,
}).then((_) {
print("Transaction commited");
Navigator.of(context).push(
MaterialPageRoute(builder: (context) => NextPage());
});
}