Hello,
I added customization for the discord webhook. Here is what the config.yml looks like:
use-discord: false
webhook-url: "YOUR_WEBHOOK_URL_HERE"
discord-join-message: "Player {Player} joined us today from {Country}"
discord-join-message-color: "#00FF00" # Hex color code for GREEN

discord-first-join-message: "The new Player {Player} joined us today from {Country}"
discord-first-join-message-color: "#FFFF00" # Hex color code for YELLOW

You can also do /geoloc webhook <webhook_url> to change the webhook. I also improved minor bugs.
Kind Regards,
Alex!