It's server.cfg
Add this line at the end of it:
rcon_password "your_password"
Then You need - after connecting from Your client's PC - write in the client's console the same line (to get access rights from the server), then Your rcon command should be working. Read also podbot.cfg file about using podbot menu on dedicated server and
that topic related to it. Then You will not need to manually type any command to add/kick a bot.