I have no clue who @Spirow734 is (i.e. we’re not connected in any way), and it’s just a bit concerning that I’m receiving an invite that seems to be meant for someone else because I’m not sure if that means the actual intended recipient of this message failed to receive their own invite.
There’s some talk about this in private servers. In a nutshell, the invite is correct, the username is not. You should register using the link there, it is intended for you, there was just a mixup with the username and all of the invites went out with the wrong name attached. It has gone to your email correctly and as far as I understand it, the rest of the signup process is directly linked to your email. The name does not matter.
There will probably be a follow-up email about it.