So I was playing AL in my phone and I find it hard in phone , So I went into pc , There was 3 choices to log in

Via Google Account , Via Spacetime and VIA FB....Because I use FB , Well I choose FB

But I can't click log in FB,.. But I can click The other choices...

Is there a way to transfer my account or change it to google account/spacetime? How please help....

:L