SitrusBlue If you have an email address in your account, try to click 'forget password' and they will prompt you to change your password. After changing, you might have a 2-factor password or something. They will open the website and once you see your account, try to use the app to log in using your twitter.
Just did this, because I had this issue too.
CrimsonShade chibi is great 
will love chibi too but what to do when the organisers have bad decision or taste. Just hope they can upgrade their taste or let us vote for the picture we wanted rather than dump us the most uummmm kind of picture that most of us don't like. To be frank, i won't put it in all the wallpapers of my devices
BurningSky this is ye xiu's birthday not su mucheng's. Another suggestion is put it in your screensaver with your other pictures