I'm creating a flutter app with firebase.
I've added as one of my auth method, google sign in.
But if I register with the same email with an email and password,
and then sign in via google with the same email, firebase will change the provider of the user from email and password to google and when you'll try to login with email and password, the older password will not be vaild any more and you'll have to go through a password reset process.
How can I prevent firebase from changing the user provider?? Or how can check if this email is already registed in my firebase project (with the same email of course)???
Under authentication -> sign in methods
Activate: One account per email address.
Related
I'm in the middle of adding firebase email/password sign in inside a React app. Specifically, it's an e-commerce site, and users will be signed in anonymously before they create an account (for things like cart data).
Here's the ideal user flow:
User registers by providing an email and password
User is not signed in immediately and instead gets a verification email
If a user tries signing in before verifying their email, they cannot sign in
User then clicks on the verification link and can sign in
I'm having issues with #3 because it appears like the only way to check if an email is verified is by calling:
const { user } = await firebase
.auth()
.signInWithEmailAndPassword(email, password)
if (user?.emailVerified) //let them enter the dashboard
However, this process signs in the user even if the email is not verified. That destroys the data on the anonymous account. And merging the two accounts isn't possible because the user thinks they are not signed in (hence it could cause UX issues if the accounts are already merged).
Any ideas?
If you're using the email+password provider, there is no way to prevent the user from signing in without a verified email address. You can of course keep them from using your app and accessing data, but you can't keep them from signing in.
If you want to ensure the user can only sign in after their email address has been verified, consider using the email link provider. You can then later allow them to set a password on the same account, either through the Admin SDK, or by creating a email+password account and linking that with the email link account. Also see the documentation on differentiating email/password from email link for some of the nuances here.
I am creating an app where the user has to signup with an Email and Password. I want firebase to first verify the email if it does exist and it is an email and sends a link to the user to verify the email after this creates the account in firebase. So how can I do it can anyone tell me?
This has been covered quite a few times before, so I'll provide some links below. The bottom line is that the Firebase email+password provider provides no way to require email verification before account creation. The closest it has to that is the email link provider, which sends an email that signs the user into an account (without entering a password).
Some previous questions on the topic:
Verify a user's email address before confirming registration, with Flutter and Firebase
Firebase email verification at SignUp
How to prevent user authentication in Firebase/Vue.js BEFORE email is verified
more...
I implemented social login using firebase SDK and i tried login using my facebook account l got this error
An account already exists with the same email address but different sign-in credentials. Sign in using a provider associated with this email address
Note
I have only facebook and twitter login in my app and my facebook email not have twitter
when I reviewed user at firebase console l already have user with this email that was registered by facebook (the same provider)
How can the same provider generate different credentials?
You get this error when the user already signed in with the same email using a different provider. eg. user signs up with Twitter using user#example.com and then signs in with Facebook using user#example.com.
Since one account per email is enabled in the project settings, the only way to recover in this case is to sign in with the first provider (Twitter in the example above) and then linkWithCredential the Facebook credential to the existing Twitter account. By doing so, the user can sign in to the same account with either provider in the future.
Firebase Auth does this for security reasons. They want to verify that this is the same user signing in and do not want to automatically link without verifying the user's ownership of both account.
I already have user that register using email and password.
When the user log out, and then login with google that has the same email, the login success with the same userId from Auth, But the email password auth is disappeared (the envelope icon is gone). It's kind of replaced.
My App for SignIn has 3 buttons:
SignIn with Phone
SignIn with Email n Password
SignIn with Google
Let say I have user A that already sign up with :
email: awesomeA#gmail.com
pass: somepassword
And then the user A is for some reason sign out, then log in again using Google, but with the same email (awesomeA#gmail.com)
In Console Auth, userId A is same as before, but the icon in firebase Auth is only showing google, the icon for email password Auth is gone
NB: Why I use email password as primary auth? Because my app contains payment information. So if the device is being stolen, I want to make it secure using firebase re-authentification system. So as long as the thief doesn't know the password, he cannot use the virtual wallet to buy anything
If you send a verification email to the user with sendEmailVerfification(), and the user confirm it, it will be added to the providers instead of replacing it. Basically having a gmail email just means "verified" as well.
When you use Google login to authenticate with Firebase, you will never have access to the user's password. That is also true for other third-party logins that work with Firebase authentication (Facebook, Twitter).
If I create a Test User using an gmail email and password on Firebase Auth using signInWithEmailAndPassword. and then on a next visit sign in using Google Sign in with the same gmail email using signInWithPopup(provider). Then on the next visit I try to sign in with the same email using signInWithEmailAndPassword I get an error code that the
password is incorrect
Shouldn't the correct error code that handles the case where the email is linked to the google Provider so I can prompt user to sign in with google instead of trying to input email and password. Or trying to reset a password.
If you create an email/password user and then sign in with a Google user, the Google account will overwrite the email/password account (assuming it is not verified). This is for security reasons, as anyone can create an unverified email/password account, possibly claiming another user's email.
Firebase Overwrites Signin with Google Account
If you want to link a Google account to an email account, you can first sign in the user with Google and then currentUser.updatePassword to add a password. The next the user can sign in with Google or email/password.