I am trying to link Facebook and Google. So, the scenario is this:
I have already authenticated with Google. So, now I am logging in Facebook, having same email id which was used earlier with Google. So, I get the error of account Exists with a different credential. And, I did this:
func fetchUserInfo()
{
Auth.auth().signInAndRetrieveData(with:FacebookAuthProvider.credential(withAccessToken: (FBSDKAccessToken.current().tokenString)!), completion: { (result, error) in
if let error = AuthErrorCode.init(rawValue: error!._code)
{
switch error
{
case .accountExistsWithDifferentCredential :
let credential = FacebookAuthProvider.credential(withAccessToken: (FBSDKAccessToken.current()?.tokenString)!)
Auth.auth().currentUser?.linkAndRetrieveData(with: credential, completion: { (result, error) in
if let error = error
{
print("Unable to link Facebook Account", error.localizedDescription)
}
else
{
NavigationHelper.shared.moveToHome(fromVC: self)
}
})
default: break
}
}
else
{
GeneralHelper.shared.keepLoggedIn()
if let currentUser = Auth.auth().currentUser
{
print(currentUser.email!)
}
NavigationHelper.shared.moveToHome(fromVC: self)
}
})
}
Here Firebase Documentation says that we need to just link the currentUser and retrieve data. But, the issue I am facing is that the currentUser is always nil. So, how can I get the current user? I have already tried this months ago and then I was able to link Facebook, Google and Email. Do, I need to signInAndRetrieve the data from Google in order to get the currentUser?
The Error "account Exists with a different credential" is because, by default, Firebase do not allow to use the same email address for two (or more) different Sing In methods. You need to enable this option.
1 - Go to Authentication > Sign-in method
2 - Scroll down to Advanced: Multiple accounts per email address
3 - Change the option to Allow creation of multiple accounts with the same email address
FYI: You need to do whole login process for each Sign In method in your app. Each method has is own credentials.
Hope this helps.
Related
After many tests I decided to create a new xCode project to better understand Firebase authentication with multiple providers.
I set up in Firebase -> SignIn Methods -> An account per email address
An account per email address
Prevents users from creating multiple
accounts using the same email address with different authentication
providers
At this point I have implemented, carefully following the Firebase guide, the login with Facebook and with Google .. Everything seems to work perfectly but I always find myself with the same error that I can't manage:
When my user creates a Firebase account via Google he is no longer able to log in if he decides to use Facebook.
Facebook returns its error when it completes its authentication flow with Firebase:
Firebase Error With Facebook Provider: An account already exists with the same email address but different sign-in credentials. Sign in using a provider associated with this email address.
Continuing to follow the documentation step by step I stopped here (firebase explains how to handle this error)
I have also implemented error handling but after calling Auth.auth().fetchSignInMethods Firebase says I should authenticate the user with the existing provider, at this point how do I get the credentials for authentication with the existing provider?
I wouldn't want to reopen the existing provider controller to get new credentials
Am I obliged to ask the user to log in with the existing provider and show another access controller again (in this case that of Google)?
How should I handle this situation?
override func viewDidLoad() {
super.viewDidLoad()
facebookSetup()
}
func facebookSetup() {
let loginButton = FBLoginButton(permissions: [ .publicProfile, .email ])
loginButton.center = view.center
loginButton.delegate = self
view.addSubview(loginButton)
}
//MARK: - FACEBOOK Delegate
func loginButton(_ loginButton: FBLoginButton, didCompleteWith result: LoginManagerLoginResult?, error: Error?) {
if let error = error {
print(error.localizedDescription)
return
}
let credential = FacebookAuthProvider.credential(withAccessToken: AccessToken.current!.tokenString)
Auth.auth().signIn(with: credential) { (authResult, error) in
if let error = error {
print("\n FIREBASE: ",error.localizedDescription)
// An account with the same email already exists.
if (error as NSError?)?.code == AuthErrorCode.accountExistsWithDifferentCredential.rawValue {
// Get pending credential and email of existing account.
let existingAcctEmail = (error as NSError).userInfo[AuthErrorUserInfoEmailKey] as! String
let pendingCred = (error as NSError).userInfo[AuthErrorUserInfoUpdatedCredentialKey] as! AuthCredential
// Lookup existing account identifier by the email.
Auth.auth().fetchSignInMethods(forEmail: existingAcctEmail) { providers, error in
if (providers?.contains(GoogleAuthProviderID))! {
// Sign in with existing account.
Auth.auth().signIn(with: "? ? ? ?") { user, error in
// Successfully signed in.
if user != nil {
// Link pending credential to account.
Auth.auth().currentUser?.link(with: pendingCred) { result, error in
// Link Facebook to Google Account
}
}
}
}
}
}
}
}
Question is very simple: I've added user authentication to iOS app using AWS Cognito and AWS Amplify. I have successfully implemented sign in and sign up, but how to get user attributes such as email, full name or phone number?
UPDATE:
For AWSMobileClient ~> 2.12.0, you can fetch user attributes as follows.
AWSMobileClient.default().getUserAttributes { (attributes, error) in
if(error != nil){
print("ERROR: \(error)")
}else{
if let attributesDict = attributes{
print(attributesDict["email"])
print(attributesDict["given_name"])
}
}
}
Per the documentation there are several property helpers for common attributes like username:
AWSMobileClient.getInstance().getUsername()
AWSMobileClient.getInstance().isSignedIn()
AWSMobileClient.getInstance().getIdentityId()
You can also get the JWT token and then pull out any user attributes:
AWSMobileClient.getInstance().getTokens().getIdToken().getTokenString()
You can use the getUserAttributes with the following API in the latest SDK version 2.8.x:
public func getUserAttributes(completionHandler: #escaping (([String: String]?, Error?) -> Void))
You can find the source code here:
https://github.com/aws-amplify/aws-sdk-ios/blob/master/AWSAuthSDK/Sources/AWSMobileClient/AWSMobileClientExtensions.swift#L532
In case you're looking for the email address specifically, and need to do so potentially offline, this would work for you:
AWSMobileClient.sharedInstance().getTokens { (tokens, error) in
if let error = error { print(error.localizedDescription) }
if let tokens = tokens {
let email = tokens.idToken?.claims?["email"] as? String
//completionHandler(email)... etc.
}
While AWSMobileClient.sharedInstance().getUsername() would be convenient, it will return the id of a User Pool user even if the User Pool is set to use email as the username. I consider this a bug, but have yet to report it to AWS.
I also research it on android (Kotlin).
// retrieve username
val username = AWSMobileClient.sharedInstance().username
When you sign in with "email" and "password", "username" is "email".
On the other hand, when the case of iOS (Swift), "username" is really "username" of cognito User Pool, even if you sign in with "email" and "password".
It is so confusing...
I have implemented firebase phone auth to verify phone number in my project and its working fine for me, But not able to update phone number. Like if a user had logged in with phone number A and now he wants to update this to phone number B. How will it be solved?
I have found an answer where you log in with your email account and update the mobile number into the same account. You may use the solution to log in with phone and update the phone number into the same account and see if it works. Anyway I will be working on this exact solution down in my project and update the answer then. But until then you can try to see if this works. Follow the regular firebase phone auth procedure as given here : https://firebase.google.com/docs/auth/ios/phone-auth
PhoneAuthProvider.provider().verifyPhoneNumber(phoneNumber, uiDelegate: nil) { (verificationID, error) in
if let error = error {
self.showMessagePrompt(error.localizedDescription)
return
}
// Sign in using the verificationID and the code sent to the user
// ...
}
let credential = PhoneAuthProvider.provider().credential(
withVerificationID: verificationID,
verificationCode: verificationCode)
Then do not use the following code
// Sign In The User
Auth.auth().signInAndRetrieveData(with: credential) { _, error in
}
But use this code
Auth.auth().currentUser?.linkAndRetrieveData(with: credential, completion: { _, error in
if error == nil {
print("Whopdee doo")
} else {
print("Aargh!!!")
}
})
When a user logs into the app using Facebook, I am able to capture and display their full name; however, neither email nor phone number is coming across. I have tried both the "One account per email address" as well as "Multiple accounts per email". I have tested it with an account whose email address is definitely not already registered in Firebase. What am I missing such that email/phone are not being captured? This all does work with Google accounts.
let name = Auth.auth().currentUser?.displayName // works!
let email = Auth.auth().currentUser?.email // nil- why?
let phone = Auth.auth().currentUser?.phoneNumber // nil -why?
The login process, which is standard Firebase w/ Facebook, looks like this:
func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!)
{
if let error = error
{
print(error.localizedDescription)
}
else
{
if FBSDKAccessToken.current() != nil
{
let credential = FacebookAuthProvider.credential(withAccessToken: FBSDKAccessToken.current().tokenString)
Auth.auth().signIn(with: credential) { (user, error) in
if let error = error
{
print (error.localizedDescription)
}
}
}
}
}
To update based on comments below. The following also produces a nil email and phone when inspecting the contents of userInfo. I understand the phone might just be that way, but it seems the email was supposed to work.
let userInfo = Auth.auth().currentUser?.providerData
The top level phoneNumber currentUser.phoneNumber is only for Firebase verified phone numbers. If you have that Facebook phone number, you can use the currentUser.updatePhoneNumber API to verify that number (you will need to go through the whole flow). Otherwise, you can wait for the upcoming Admin node.js API to set phone numbers with Admin privileges on existing users: https://github.com/firebase/firebase-admin-node/commit/68563c4b2c8128fbc45fc65bad3f6730d320b539
As for the email, in the case of "multiple accounts per email" you need to set it yourself via currentUser.updateEmail. You can get the Facebook email from currentUser.providerData which contains the Facebook provider data.
I have an facebook login system which works with firebase but I want to check if user exist on my firebase (i don't want to add it, just want to make sure if he exist because I want to redirect user to another page to complete its profile, once its done I'll want to send it to firebase).
I just need to check if user exist on my db. Here is the code that I try but it returns nil error and it automatically add user to firebase.
let credential = FIRFacebookAuthProvider.credentialWithAccessToken(FBSDKAccessToken.currentAccessToken().tokenString)
FIRAuth.auth()?.signInWithCredential(credential) { (user, error) in
// ...
}
You can use reauthenticateWithCredential method to check user is exist or not.
Check this Doc. , section -> Re-authenticate a user
let user = FIRAuth.auth()?.currentUser
var credential: FIRAuthCredential
// Prompt the user to re-provide their sign-in credentials
user?.reauthenticateWithCredential(credential) { error in
if let error = error {
// An error happened.
} else {
// User re-authenticated.
}
}
If user re-authenticated successfully that means user is existed...