For anyone wondering how to mention specific roles besides @here or @everyone, let's use an example:
You want to mention the @admins role. First we need to get the Role ID. You can do this by typing \@admins in your discord server, this will output a string similar to this: <@&164103385761892222>
So then in discord_calladmin.cfg we'll have this:
discord_calladmin_mention "<@&164103385761892222>"
and ta-da, you're done! Figured that would be helpful since it took me a little while to figure out how to do this, d'oh!