I cant login into Board

Hi im ToXiC
i just wanted to start to work with Unreal Engine, while my Study living mate is finishing his Final Exam in Unreal
cause other Engines werent the best for me so i decided to start with UE.

im German but the thing is he has an account and i created today one, I cant login into the Unreal Board cause evrytime i try to login he is telling me, that i have to tell that to an administrator and it says again on the top right “login”
can you help?