I don't have a fixed solution for your problem. But if you are concern about login problems, to avoid further failure to login to the game, the temporary solution is to use puffin browser maybe (using vpn also if you are in a different country) through mobile phone. This is only temporary until the Mods/Support tells you what to do. Hope this helps!

Hello, based upon what you have stated, the issue would lie either with the internet provider, or with a server lying between you and the game. I would suggest trying a few more servers from within the VPN, to see if it allows you to bypass the issue. If it does not help, you might need to contact your internet provider to see if there is anything they can do to help the issue.

to start with your question, no you are not ddos-ed , distributed denial of service is when someone floods your internet so much till your internet service provider stops your internet entirely for a period, entirely not parts of it, what you are experiencing probably is either a authentification bug (not login but ip, sort of some services sees your ip as banned or something) or it might be as someone stated in other post countries or regions banning oasis's ips, but if you said you managed to log in might be something temporal only (iv experienced the same stuck at i think 54% but got fixed the same day for me and yes nothing from cache to dns to anything worked it just start working again, now that i think about it seems more from a server side problem)