I have been going back and forth with the support about this. The issue is with Google+ authenticator PlayGamesPlatform unity addon.
If your account is linked to the facebook, you are fine. However if it is not - google authenticator is not working.
The "Daria" character told me that it suppose to be fixed in 24 hours.
EP
P.S> Be aware there is appears to be more than one Daria. This one Daria told me to contact another Daria on this issue, that I did.
The other Daria appears to suffer from Multiple Personalities Disorder (MPD). I contacted the Daria on the prior issue like 5 times could not login for 5 days. Received 5 responses <emails> from Daria like 5 days later and one from Chase.
Asked if I could be compensated <fishing for gold>. The Daria came in and blatantly declared they ONLY RECEIVED ONE EMAIL, while I had FIVE different replies <ALL DIFFERENT suggestions>. I repeated the issue yet in another email, saying look I emailed you 5 times. Daria was adamant she only received one email. So Initially I thought: she was LYING, right? Or may be playing with "the product"... Or shameless...
But then the other Daria came in and declared that she has not heard from me. (I have the screenshots to prove it)