I m recently coding an app, where i use firebase as backend.
I created a method to sign up with firebase but I dont want it to sign in with the new user recently created. Is it possible to keep firebase auth signed in with the current user who adds the new user?
Is it possible to keep firebase auth signed in with the current user
who adds the new user?
With the clients SDKs/plugins (FlutterFire, JavaScript SDK, etc.) this is not possible.
One way is to use the Admin SDK to create your users. For example you can create a Callable Cloud Function which creates the users and which is called by the end-user from the front-end.
I've written an article that details the entire approach with the corresponding code.
Related
I have been trying to find an answer for a while now. I am creating a react native App, and want to send personalized notifications to a user. I only want to ask the user for their name and number, and don't want to make them create an account. Is there a way i can save this info in firestore?
Right now for firestore the only way I see to save user data is to first make them sign in.
auth.createUserWithEmailAndPassword(email, password)
I just want to be able to get a users name and save it in a database, to then be able to send notifications like "Good Job John Doe". My app has no need for an email and password auth.
You can use anonymous authentication to create temporary anonymous accounts. This can be linked to a user if they decide to sign up to your app.
You can use firebase firestore to store user information without using authentication.
Just simply ask the user about their name and number, save it in the firestore. Then using Firebase Cloud Messaging subscribe to a topic which will be unique to the user (name+number or something like that). Then using firebase cloud function or manually you can send notifications to each individual user
I'm making a little Snapchat clone, and a part of this app I'm trying to build is the ability to add a friend and start a conversation with them. I'm using Firebase to manage my users and I'm a little stuck now trying to figure out what works and why I'm getting problems trying to use some methods or functions.
What I want is this simple line of code to work:
var userByEmail = await _admin.app().auth().getUserByEmail("b#gmail.com");
print(userByEmail.toString());
However this has been giving my some problems, most recently, the following error message:
Unhandled Exception: FirebaseAuthError(auth/invalid-credential): Must initialize app with a cert credential or set your Firebase project ID as the GOOGLE_CLOUD_PROJECT environment variable to call verifyIdToken().
Getting to this point made me want to first ask a question about FirebaseAdmin and Auth before continuing and potentially screwing up my app settings.
Is there a simple way to do what I'm trying to do?
I have a Firebase.instance.initializeApp() in my Main function, do I only ever call that once or should I start initilizeApp in the initState of each Stateful Widget where needed?
What does this error message actually mean?
You are trying to use the Firebase Admin SDK in your Flutter code, which is not possible. The Admin SDKs give full administrative access to your Firebase project, which would be a serious security concern if you allow that in your Flutter app.
If you want to allow certain administrative functionality in your application, you will have to make that functionality available yourself. For example, to look up a user by their email address, there are two common approaches:
Store the minimal information about each user in a cloud-accessible database (such as Firebase's Realtime Database or Cloud Firestore) when each user registers with your app, and then look it up from there.
Wrap the getUserByEmail from the Admin SDK in a custom API that you make for yourself, on a server you control or in Cloud Functions. In that API you validate that the user making the call is authorized to do so, then call Firebase through the API you were trying to use, and return the minimal result back to the caller.
Both of these are feasible and can work to solve a variety of use-cases. But if you've never built backend code before, you might find the first approach easier to get started with.
Also see:
How to get Firebase UID knowing email user?
Flutter get User Data from Firebase
The right way to do what you want is using Firebase auth, authenticating your user and using a collection to store and retrieve users information. That auth information provided by firebase should only be used for authentication and security purposes.
The Firebase admin must have a user logged in to work properly, but its purpose is to provide a more administration environment and should not be used inside a clients app, unless its an admin app.
With all that said, lets go for the rescue:
Authenticate your user (using firebase auth);
After auth, save all the user information you want to share with other user inside its own collection (you will need to create one);
When an authenticated user (this is important) 'request any other users data, you query for the data in the previous created collection.
I am trying to make a Flutter app where the user can sign in into multiple accounts (different email IDs) and can switch between them from the UserAccounsDrawerHeader. For example, in Gmail app, users can switch between multiple Gmail accounts. Is this possible using Firebase Auth for Flutter?
In the default scenario, Firebase Auth generally does not support allowing a user to be signed in with multiple accounts at the same time. If you want to add support, what you will have to do is use initailizeApp() to initialize a new App instance - one for each user account, and sign in the user to each one of them. You will then have to pass that app instance around to the other Firebase APIs to use that account for authenticated access (for example, Firestore queries).
To be honest, it's not clear to me from the provided APIs how to do that last part. but perhaps Firestore.getInstance(app) might do it.
In any event, it is not trivial to implement. There is not a simple configuration or trick that will allow multiple simultaneous sign-ins. Usually apps just make the user sign out, then in again with another account.
I have a Firebase project, which I'm currently using with android. I need to programmatically fetch details of the users authorized along with the UID, Email, etc. Exactly the way it is shown in firebase (with the search), this web portal will be given to the vendor or the person using it to verify the user's authenticity.
I've attached the screenshot from Firebase, I'm hoping to replicate it the same way with the search. If this is possible, how do I go about doing this?
It's not possible to list users from an Android app, using only the Firebase Authentication SDK. You can list users using the Firebase Admin SDK, but that can only be run on a backend you control, using service account credentials for your project.
It might be easier if you store user info in a database, to be queried by client code, rather than try to have your app try to access auth data directly.
I'm working on an enterprise application in which administrators create new users (there is no sign-up form). I am using Firebase Auth, which is great in many ways, but I've come across a problem for my use case. When you use firebase.auth().createUserWithEmailAndPassword(email, password), the user thereby created is automatically signed in. This obviously won't work when an admin is creating the user accounts. Is there any way to avoid this behavior? Thanks.
This is a good use case for the Firebase Admin SDKs. Instead of creating the user client-side, you create the user in a managed environment, like a server or Cloud Functions. You have the client make a call to your endpoint when you want to add a new user. This codelab shows how to incorporate custom claims using the Firebase Admin Auth SDK. This is a little different from what you're exactly looking for, but it can get you started in the right direction.