You can sign into day5.net using your Steam account

It's an older code Sir, but it checks out.

Note that day5.net is not affiliated with Steam or Valve

By signing into day5.net through Steam:

• Your Steam login credentials will not be shared.
• A unique numeric identifier (your Steam ID) will be shared with day5.net.
• Any public Steam Profile info may be accessed by day5.net.
• By clicking "Sign In" you agree to this data being shared.

You could also take this opportunity to check your Steam Profile Privacy Settings settings.

We use your Steam ID and/or game name to aid the administation of our DayZ game server and to provide community features and services on the website.

We need your game name to match to your in-game ID so we can add you to the whitelist!