register page has not worked

[div5268singh]

I have do same as you but in it I fill everything in my text form filed and when I have submitted it so it not post the value to firebase and not save it that is my post method

void signUp(String email, String password) async {
if (_formKey.currentState!.validate()) {
try {
await _auth
.createUserWithEmailAndPassword(email: email, password: password)
.then((value) => {postDetailsToFirestore()})
.catchError((e) {
Fluttertoast.showToast(msg: e!.message);
});
} on FirebaseAuthException catch (error) {
switch (error.code) {
case "invalid-email":
errorMessage = "Your email address appears to be malformed.";
break;
case "wrong-password":
errorMessage = "Your password is wrong.";
break;
case "user-not-found":
errorMessage = "User with this email doesn't exist.";
break;
case "user-disabled":
errorMessage = "User with this email has been disabled.";
break;
case "too-many-requests":
errorMessage = "Too many requests";
break;
case "operation-not-allowed":
errorMessage = "Signing in with Email and Password is not enabled.";
break;
default:
errorMessage = "An undefined Error happened.";
}
Fluttertoast.showToast(msg: errorMessage!);
print(error.code);
}
}
}

postDetailsToFirestore() async {
FirebaseFirestore firebaseFirestore = FirebaseFirestore.instance;
User? user = _auth.currentUser;
UserModel userModel = UserModel();
userModel.email = user!.email;
userModel.uid = user.uid;
userModel.name = nameEditingController.text;
// userModel.no = mobileEditingController.text;
await firebaseFirestore
.collection("users")
.doc(user.uid)
.set(userModel.toMap());
Fluttertoast.showToast(msg: "Account created suscessfully");
Navigator.pushAndRemoveUntil((context),
MaterialPageRoute(builder: (context) => nav()), (route) => false);
}
}