Flutter: Creating a user in Firestore using the account created from Firebase Authentication

Question

I am creating a flutter app using dart language with Firebase for authentication.

My code for a user signing up is

  Future<void> signUp() async {
if(_formKey.currentState.validate()){
  _formKey.currentState.save();
  try{
    AuthResult user = await FirebaseAuth.instance.createUserWithEmailAndPassword(email: _email, password: _password);

    Navigator.of(context).pop();
    Navigator.pushReplacement(context,MaterialPageRoute(builder: (context)=> LoginPage()));
  }catch(e){
    print(e.message);
  }

Does anyone know how I would use that newly created users credentials to create an entry in the database for user?

I have set up the database with a dummy user which I manually entered but would like to be able to create entries from a user signing up.

Solution

You can get the uid from AuthResult to create a document in Firestore. setData updates the document or in this case, creates one because it doesn't exist. Make sure to install cloud_firestore_package.

UserCredential result = await FirebaseAuth.instance.createUserWithEmailAndPassword(email: _email, password: _password);
User user = result.user
await FirebaseFirestore.instance.collection('users')
      .doc(user.uid).set({ 'firstName': _firstName})

Comments

[callum norris]

Thanks for the very helpful answer!! For anyone else reading this, I added the package & installed it. Then needed to enable multidexing link You can use this line of code for adding multiple values to the one document as per below code: codeawait Firestore.instance.collection('users').document(user.uid).se‌​tData({ 'firstName': _firstName, 'lastName': _lastName, 'userName': _userName})

[adamcapjones]

result.user is returning an error: LateInitializationError: Field 'user; has not been initialized.