In order to use Pind Manager System you need to sign in via Google.
In most cases, Autologin should be sufficient since it would use the same user you used last, if possible. Choose Account should only be necessary if you picked a wrong account or want to change to another PMS-account.
Use the email that you you know is assign to your account here at PMS - if you have a @spilpind.dk-account, it's properly that! ;)