Does anybody know of an easy way to pit two bots against each other?

Me and a few friends have started building our own bots and playing against them on lichess using the python bridge here: https://github.com/careless25/lichess-bot We'd quite like to have them play against each other to see who's is the strongest. I can see there is a challenge method listed in the API (https://lichess.org/api#operation/challengeCreate) but the bridge doesn't seem to support it. Does anybody have anything that already supports this before we write something of our own? We also tried logging in as a bot on the website and issuing the challenge but seemed to be reliant on the moves being made on the website.

@pawntificate You can create a bot and send a challenge to another. What's the problem?