Firstly is the account you are using the same account you wish to access Battle dawn with as if so then you can use the same details you are using to log into the forum to log into the game.
Secondly if this is not the case then can we please have a screenshot of the issue which you highlighted in this post
mathanwarrior wrote:
This is my first account/best one it doesn't say its wrong it loads then stops and just doesn't work so My name gets smaller if that makes sense. b.t.w wouldn't work
then this could help us see what the problem can be.