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What will happen if I login via Google and via Facebook to Stack Overflow and Google as well as Facebook use the same email address? Will Stack Overflow create two separate accounts or will it "merge" accounts and use only one?


I was using login via Google all the time. When I tried Facebook I got an error saying I am not able to login so that's why asked the question.

However, when tried a few minutes later with Facebook I was able to login successfully. Also I was using the same account as with login via Gmail.

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Have you tried it? I think it will add another account. But you can add your logins yourself. Go to your profile click on my login.

enter image description here

Now click on add more logins... and add both Facebook's OpenId there.

enter image description here

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