This is what you do if you need to set a password on your Counter-Strike 2 server.

Setting Your CS2 Server Password

1
Log in to Bropanel and open your CS2 server.
2
In the sidebar, go to Settings.
3
Look for Server Password and then type the password you want.
4
Go back to the console page, then restart your server.

CS2 Server Settings

What this does is, it will automatically edit your /game/csgo/server.cfg setting for sv_password. You can check the password is actually set by typing sv_password into the console itself.

In-game clients must open the console and type password yourpassword before they can connect to the server.