Change Login Screen for Open Beta LoL Launcher

Hello, any summoner that is reading this! If anybody could help, I want to make the Open Beta Launcher be a little more customized to my liking, I really want to change the login screen whenever I open the new and fancy launcher, I was wondering how I could do this and if nobody knows, I can just keep it like it is but, I'm curious if I can and It would be helpful is anybody knows.

Thanks,

KenWayTheGod with GGs and <3s!

Bye Bye!