Yeah sorry, the game should not kick you out from an auth error. I have updated the game to not do this but unfortunately I'm half way through a compatibility breaking update so releasing a quick patch right now would not be ideal. I have tweaked the cloudflare cache settings to hopefully reduce this problem.
Latest attack came from 74.115.1.186 which is a VPN service but the earlier attack came from 71.206.219.128 which is a comcast IP in Pittsburgh.
Is it from a user or just an external source?