Multiple accounts with same email not combining (Google & Facebook)

[ahaverty]

Environment:

• Android device: Nexus 6P
• Android OS version: Android N
• Google Play Services version: 9.4.0
• Firebase/Play Services SDK version: 9.4.0
• FirebaseUI version: 0.5.3

The problem:
Signing up with the same email address via two different providers (Facebook and google), is resulting in two different users, but only one having the email address.

Steps to reproduce:
With 'Multiple accounts per email address' enabled, and Facebook and Google signup providers working (and capturing emails) for fresh users.

1. Signup as a new user with either provider, (firstly removing any previous firebase accounts with the same email).
2. Notice the users email was captured in the firebase console.
3. Logout and signup via the alternative provider, using an account that has the same email as step one.
4. Notice firebaseUi proceeds, but creates a new firebase user without an email address
5. What is strange is that alternating between the provider I try from fresh, both Google and Facebook can capture the email, but not after an account with the email has been made.

Expected Results:
I'm expecting the accounts to be joined together.
Am I wrong in assuming FirebaseUI should do this?
Disabling 'Multiple accounts per email address' is a great workaround considering that FirebaseUi notifies a user about an existing account, but it would be nice to get past this small issue if this repo is already capable.

I'm not seeing any logs for firebaseui, presumably because I'm not hitting any errors. Let me know if I should be or if I can provide any more detail.
Thanks for the help!

[ahaverty]

I've perhaps misunderstood firebase's 'multiple accounts per email address' feature. (I assumed it allowed me to join a facebook and google provided user under the same firebase UID, but it looks like it allows multiple different firebase users/UIDs with duplicate emails?)
However I still believe I've found a defect with FirebaseUi not capturing emails after the first user account.

[samtstern]

@ahaverty I understand your confusion, but this is working as intended. Multiple accounts per email address means exactly what it says: there may be multiple Firebase Auth accounts with the same user email address. These accounts are distinct.

In order to get the accounts to merge you need to disable that setting in your console. Then FirebaseUI will attempt the link account flow.

[samtstern]

@ahaverty could you explain your second issue a little more? "not capturing emails after the first user account".

I don't quite understand the issue.

[ahaverty]

Sure,

1. Say I have a google account (alan@test.com) and a Facebook account (alan@test.com)
2. I remove all firebase users from Firebase.
3. I register a new user using FirebaseUi with my google account first via the google provider, all goes well and firebase console creates a new user with my alan@test.com email attached to that user
4. I then logout, and try to register using my Facebook account this time.
5. FirebaseUi seems to go okay, a new user is created in firebase console, but this time the email is blank (I'm seeing "-")
6. Going back to step 2, clearing all users, but this time trying Facebook registration first, all works okay, including the email address being attached this time
7. Trying google registration second, a new user is created okay, but like Facebook in step 5, there's no email attached to the new user

Does that make sense?

Thanks for clarifying the merge for me, thats exactly what I need

[samtstern]

@ahaverty this does sound like a bug (I didn't implement that behavior but it's not what I would expect either).

I will look into it, thanks for the report!

[ahaverty]

Just to add a very minor finding. It looks like firebase's console was updated in the last day. Anonymous user's email field is now clearly denoted by '(anonymous)' whereas the issue I was having, still shows the email field as a '-'

[ahaverty]

Just on the off-chance this is related, I'm now getting duplicated provider icons on users with merged providers. I'm only using this repo to register users.
I'll send in a bug ticket to firebase also.

[amandle]

@ahaverty I just spoke with the Firebase team, and they confirmed that this is a known issue with Firebase iteself.

[jashick]

Any update on when this will be resolve?