I am developing an iOS app where i use Social.framework and Accounts.farmework to get Twitter account information.I am getting all the necessary info but not the Email address of the account.
After googling i am confuse is it really available?
Need help.
To request a user’s email, call the TwitterAuthClient#requestEmail method, passing in a valid TwitterSession and Callback.
TwitterAuthClient authClient = new TwitterAuthClient();
authClient.requestEmail(session, new Callback() {
#Override
public void success(Result result) {
// Do something with the result, which provides
// the email address
}
#Override
public void failure(TwitterException exception) {
// Do something on failure
}
});
Click 'Allow' when asked to 'Share your Email Address'.
If the user grants access and the email address is available, the success method is called with the email address in the result.
If the user denies access, the failure method will be called instead.
Note that even if the user grants access to her email address, it is not guaranteed you will get an email address. For example, if someone signed up for Twitter with a phone number instead of an email address, the email field may be empty. When this happens, the failure method will be called because there is no email address available.
Yes, you can get user the information. Check out this!
Related
I have a strange error when I work in firebase flutter facebook login.
It always results in null email. And when I see the firebase console, the email field is registering with _.
I have searched on StackOverflow to figure out this error but could not succeed.
And I have followed the steps in facebook account for iOS setup.
What kind of possible reasons are there?
And If I try to log in with facebook, this shows "You previously logged in to this app with facebook account" even though I never logged in before...
Help me guys. I am struggling with this issue for more than 10 days!!!
// Sign in with Facebook.
static Future<Map<String, dynamic>> signInWithFacebook({bool isSignUp}) async {
try {
await signOutFacebook();
UserCredential userCredential;
// Trigger the sign-in flow
List<String> permissions = ['email', 'public_profile'];
final LoginResult loginResult = await FacebookAuth.instance.login(permissions: permissions);
// Create a credential from the access token
final OAuthCredential facebookAuthCredential =
FacebookAuthProvider.credential(loginResult.accessToken.token);
// Once signed in, return the UserCredential
userCredential = await FirebaseAuth.instance.signInWithCredential(facebookAuthCredential);
final User user = userCredential.user;
print("User info after facebook login ${user.providerData[0].email} ${user.uid}");
// ************************************** This is showing null email ***** //
if (isSignUp) {
Map<String, dynamic> resultOfSaveSocialUserToDatabase = await saveSocialUserToDatabase(user, 'facebook');
return resultOfSaveSocialUserToDatabase;
} else {
Map<String, dynamic> resultOfValidateSocialLogin = await validateSocialLogin(user, 'facebook');
return resultOfValidateSocialLogin;
}
} catch (e) {
print(e);
return {'success': false, 'message': "Sign up with social account failed"};
}
}
This happens cause you might have created your facebook account using your phone number instead of email.
So, it turns out to be an empty email address as an empty identifier.
You can try out with a different fb account which may be created using an email address instead of phone number.
This can also happen when the user elects to not share his email when login in with his FB account for the first time.
How do I check if a user exists in my Firebase Database only by email within Swift?
The first screen the user should see allows him to type in his email. After that he gets to the sign up page or the login page depending on wether or not the user exists.
You're looking for fetchSignInMethodsForEmail, which returns the sign-in methods with which the given email is registered. With that information you can build a sign-in screen.
Try with this:
Auth.auth().fetchProviders(forEmail: email) { (providers, error) in
if error != nil {
print(error?.localizedDescription)
} else {
print(providers)
}
}
If the email address has not yet been used, the empty list (providers) will be printed.
I have the following logic in my iOS app:
User registers
Firebase sends an email confirmation
Returns to login screen
Now if the user logs in, without verifying the email, then we have a user session and isEmailVerified is false.
I only need to check the isEmailVerified in a certain point in the app.
Also I think signing the user in, checking the field and signing the user out would be bad practise.
I'd need to reauthenticate the user, what is the best way of doing this? How can I, after the user has logged in, switch the status of isEmailVerified?
Thanks
First, you need to have the email and password to create a credential. Your user already provided this on the login page... So the email and password to persistent storage on iOS. In Android, the equivalent would be SharedPreferences.
I do not code in iOS, but this will give you the idea for the logic.
Then, when you get to that point in your app where email verified is called:
if (user.isEmailVerified) == true {
// you do not need to hold the email and password in persistent storage anymore.
// go into your persistent storage and delete the data.
} else {
// get the email and password the user saved in persistent storage.
String email = persistentStorage.getEmail();
String password = persistentStorage.getPassword();
var user = firebase.auth().currentUser;
var credentials = firebase.auth.EmailAuthProvider.credential(email, password);
user.reauthenticate(credentials);
// then, when finished reauthenticating, check whether isEmailVerified() == true;
}
I have a question which looks silly but I can't find answer anywhere.
I have a simple signup iOS procedure which relies on Firebase Authentication SDK.
At a certain point after the user is created with:
FIRAuth.auth()?.createUser(withEmail: userName!, password: password!)
right after that I sent my user a verification email:
FIRAuth.auth()?.currentUser?.sendEmailVerification(completion:
{(error) in
if error == nil
{self.showSuccessPopUp()}
else
{self.showErrorPopUp()}
})
Everything works more than fine, no problem at all.
My question is: my user receives the email and - for any reason - didn't click on the autogenerated confirmation link.
Later on he open the app again and - forgetting that he already register once - tries to signup with the same email address.
Firebase just says that there's already an user created with that email address - as per documentation the user is created even if not 'active' -, therefore I'd like to give my users the option to have a "Resend verification email".
I've been digging into Firebase API documentation without a solution.
Does anyone have ever had the same 'issue' ?
Thanks for any help
Though late I would answer this in two scenarios:
1: You successfully called createUser, but when the user opens the app again, firebase.auth() says they are not signed in
In this case, the account exists with a password, so you will need to send a 'reset password' email, not an authentication email
2: You successfully called createUser, but when the user opens the app again, firebase.auth() says they ARE signed in
In this case, they are logged in, but not verified. Use
firebase.auth().currentUser.reload() // reloads user fields, like emailVerified:
if (!firebase.auth().currentUser.emailVerified) {
//resend verification email
} else {
//login
}
pardon my use of javascript but should be easy enough to translate
This question already has a short answer but I'll add my answer as I was facing the same problem. So there's already an user created with that email address. Later on the user opens the app again and wants to resend the email verification, but this time you don't create the user with email as there's already an user created in firebase with same email address, instead you can signing the user through firebase first as firebase already has user's details, if successful then get the current user from firebase. Now you can give your users the option to have a "Resend verification email" if they haven't verified yet. See the code below to get clear idea.
The following code assumes that user receives the email and - for any reason - didn't click on the autogenerated confirmation link. Later on he open the app again and - forgetting that he already register once - tries to signup with the same email address. Therefore you want give users the option to have a "Resend verification email".
firebaseAuth.signInWithEmailAndPassword(username, password)
.addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
firebaseUser = firebaseAuth.getCurrentUser();
firebaseUser.reload(); // Here you finally get the user, now you can send verification mail again.
if(firebaseUser.isEmailVerified()) {
// TODO
}else {
// TODO
Toast.makeText(LoginActivity.this, "Please verify your email first!", Toast.LENGTH_LONG).show();
}
}
}
});
Now set a button Resend or something
Here's the code for that
resend.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(firebaseUser!=null){
firebaseUser.reload();
if(!firebaseUser.isEmailVerified()) {
firebaseUser.sendEmailVerification();
Toast.makeText(LoginActivity.this, "Email Sent!", Toast.LENGTH_LONG).show();
}else {
Toast.makeText(LoginActivity.this, "Your email has been verified! You can login now.", Toast.LENGTH_LONG).show();
}
}
}
});
This can be done using a firebase function with an email sending module (Nodemailer or Firebase Trigger Email extension for example)
The solution is in the firebase documentation
See section Generate email verification link
I want to allow a user to enter their email address/password in a field. Upon continuing, I want to run a check to see if that user already exists. If they do, log them in and continue with app, if they do not, move to account creation flow where they will be instructed to add name, phone number, etc.
I cannot for the life of me find documentation on how to log a user in using AWS Cognito. I should be able to pass email/pass in a call and get a response back that says User Exists/User does not exist or whatever! Am I missing something here?
Any help would be greatly appreciated. I've scoured the documentation..this is my last resort.
In the current SDK, calling getUser on your AWSCognitoIdentityUserPool just constructs the in-memory user object. To make the call over the network, you need to call the getSession method on the constructed user. Here's a Swift 3 method I wrote to check whether an email is available:
/// Check whether an email address is available.
///
/// - Parameters:
/// - email: Check whether this email is available.
/// - completion: Called on completion with parameter true if email is available, and false otherwise.
func checkEmail(_ email: String, completion: #escaping (Bool) -> Void) {
let proposedUser = CognitoIdentityUserPoolManager.shared.pool.getUser(email)
UIApplication.shared.isNetworkActivityIndicatorVisible = true
proposedUser.getSession(email, password: "deadbeef", validationData: nil).continueWith(executor: AWSExecutor.mainThread(), block: { (awsTask) in
UIApplication.shared.isNetworkActivityIndicatorVisible = false
if let error = awsTask.error as? NSError {
// Error implies login failed. Check reason for failure
let exceptionString = error.userInfo["__type"] as! String
if let exception = AWSConstants.ExceptionString(rawValue: exceptionString) {
switch exception {
case .notAuthorizedException, .resourceConflictException:
// Account with this email does exist.
completion(false)
default:
// Some other exception (e.g., UserNotFoundException). Allow user to proceed.
completion(true)
}
} else {
// Some error we did not recognize. Optimistically allow user to proceed.
completion(true)
}
} else {
// No error implies login worked (edge case where proposed email
// is linked with an account which has password 'deadbeef').
completion(false)
}
return nil
})
}
For reference, my ExceptionString enum looks like this:
public enum ExceptionString: String {
/// Thrown during sign-up when email is already taken.
case aliasExistsException = "AliasExistsException"
/// Thrown when a user is not authorized to access the requested resource.
case notAuthorizedException = "NotAuthorizedException"
/// Thrown when the requested resource (for example, a dataset or record) does not exist.
case resourceNotFoundException = "ResourceNotFoundException"
/// Thrown when a user tries to use a login which is already linked to another account.
case resourceConflictException = "ResourceConflictException"
/// Thrown for missing or bad input parameter(s).
case invalidParameterException = "InvalidParameterException"
/// Thrown during sign-up when username is taken.
case usernameExistsException = "UsernameExistsException"
/// Thrown when user has not confirmed his email address.
case userNotConfirmedException = "UserNotConfirmedException"
/// Thrown when specified user does not exist.
case userNotFoundException = "UserNotFoundException"
}
Some clarification is in order. Cognito has several parts. The part that does "Authentication" (which is what you are talking about) is called "Cognito User Pools". Not to be confused with Cognito Federated Identity Pools.
With User Pools you can create usernames and password combinations with attributes, and these can be used to authenticate and deliver a persistent, cross device, Cognito Federated identity identityId to a user (across multiple devices).
Once logged in, the Federated Identity Pool is hooked to roles which can get your "Authorized" to use AWS services (like Dynamo DB etc).
It can be tricky to get all these parts working together and AWS has an online site called "Mobile Hub" that will build code for you and download an xcode project. This process configures the Federated Identity Pool and the User Pool correctly, and connects them all up to a set of example code.
Connecting the credentials provider to the user pool to the identity pool is a bit counterintuitive, but the AWSIdentityManager in the aws-mobilehub-helper-ios on github manages all that for you. So I would recommend starting with mobile hub on the console.
Cognito is a somewhat confusing system, here is a link to a brief powerpoint that hits the highlights of how it works (for people that can't understand the AWS docs (like me)).
With that said, "how to check if a user already exists?"
The most reasonable approach is to create the user (via signup), and get a reject if the name is in use, and suggest that your user try a different username. With respect to the email being in use, you will get that reject upon confirmation (signup sends confirmation id's by email and/or via text). This can be overridden to reclaim the email address, or you can do a test beforehand to see if the email is in use by attempting to log in and looking at the failure code.
you can fetch the user as the other answer suggests, however if you have established in user pools an alias for login (like email) you will find this problematic, because this just tells you if someone has the user name, not if someone is already using the email address, and you will get a reject later at confirmation time.
ListUsers is now a nice way to check for existing usernames.
https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_ListUsers.html
You can also look for existing emails, phone numbers, and other default attributes.
Here is a simple .NET example:
Dim userRequest = New ListUsersRequest With {
.UserPoolId = "poolId",
.Filter = "username = bob#email.com"
}
Dim response = amazonCognitoIdentityProviderClient.ListUsers(userRequest)
Debug.WriteLine(response.Users.Count)