If you’re talking about these, what exactly do you mean by “adapter”? Are you saying it doesn’t come with a charger to charge the battery part of it? Or are you sayig that it came with a charger but not an adapter to plug into the wall.
You you mean the latter, then you’ll have to just plug it into a computer or something else that has a USB port.
If you mean it didn’t come with a charger at all, then you’ll have to take it back to the store and ask them. Without knowing the threading on the battery, I cannot direct you to a charger because we would need to know the threading of the battery.
Chargers that come with cigalikes usually look like this…
or like this