verificar password flutter stream
Stream<bool> get registerValid => Observable.combineLatest3(
email,
password,
confirmPassword,
(e, p, c) => (0 == p.compareTo(c))
);
Stream<String> get confirmPassword =>
_passwordConfirmController.stream.transform(validatePassword)
.doOnData((String c){
// If the password is accepted (after validation of the rules)
// we need to ensure both password and retyped password match
if (0 != _passwordController.value.compareTo(c)){
// If they do not match, add an error
_passwordConfirmController.addError("No Match");
}
},
);