( Sorry for the last post reply, this is a copy paste ) D:
I have the same problem but, im start to play 2 months ago, i stop playing for some fixes on my pc.
At leats 3 hours ago, im playing so well, im stop on one of the battle with a wild pokemon, and the server kicked me for afk. ( I believe )
Well, i try to conect, and BANG the problem of authenticaying.... ( Have bad english i know )
Anyone gets me some help T-T?
( Ohh the most curious is i dont need to put any Username or Password to get " Authenticating " so, The box " Username " and " Password " Are empty and i try to login, and stuck on Authenticating )