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I have a login already using Facebook credentials. But I need another login on Stack Exchange itself. It's because I use my friend's Android device to access my account, and it does not let me in anyway...
I had been using it on the web using my laptop only, since my phone is a Windows Phone.
There is an option in the app for an SE username and password. But they are probably not as same as Facebook login.
How can I do it?