I want my account back！！

I used to log in with my Sina account in the old version but the new version doesnt have it anymore! My friends can still find me by searching the ID, but I just CANNOT figure out how to log in! And I noticed that many of my friends who logged in with their Sina account have that problem as well. As a result, please do something, and I want my account back!!!!!!

为什么渣浪你可以登录了！开发人怎么想的，皮皮虾我们走

ndnksksnshhsj about LINE PLAY - Our Avatar World, v4.9.0