You can grant permissions while the server is running or by editing the configuration while it is stopped.
While the server is running
- Open Web Console.
- Enter ownerid "SteamID64" for an owner or moderatorid "SteamID64" for a moderator.
- Run server.writecfg to save the configuration.
- Disconnect from and reconnect to the server.
While the server is stopped
- Stop the server.
- Open Configuration Files.
- Click Text Editor for users.cfg.
- Add one entry per user:
ownerid "SteamID64"
moderatorid "SteamID64" - Save the file and start the server.