Pick a size, pick a colour, then open a style to copy its code. Every badge updates itself with the live player count.
GameTracker's default banner size, so it drops straight into an existing slot.
<a href="https://mantascope.com/fivem/server/server-1291166"><img src="https://mantascope.com/server-img?id=1291166&size=banner&style=poster&color=auto" width="560" height="95" alt="Humanes Rp built with QBCore Framework by JericoFx & Kakarot & Hamy!" /></a>