retrieving username with signInWithEmailAndPassword - database

Question

i manage my users with the Firebase Admin SDK.
On signup i send email,password and username to my endpoint.
i createUserWithEmailAndPassword and create a doc in my firestore
This way i can check if a document already exists and return an error that the username/handle is already taken.
Firestore
- users
- handle
* email
* userId (from createUserWithAndPassword Response)
* createdAt
After the user signInWithEmailandPassword i only have the token, email and userId.. but i need the handle to get the right user details.
what i get from the docs is that there is a default displayName property but i dont know how to set it on signup.
or should i create a custom Token and store the handle inside of it..
im not sure how to go from here
thanks for your help

Answer 1

This is a simple method for what you want:
mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(task.isSuccessful()){
// Sign in success
FirebaseUser user = mAuth.getCurrentUser();
UserProfileChangeRequest profileUpdates = new UserProfileChangeRequest.Builder()
.setDisplayName(mName).build();
user.updateProfile(profileUpdates).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if (task.isSuccessful()) {
Log.d(TAG, "User profile updated.");
}
}
});
}
});
Then, to retrieve it, use this wherever required:
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null) {
// Name, email address etc
String name = user.getDisplayName();
String email = user.getEmail();
}
There are multiple ways, but I recommend to use this one :)