There is nothing to do, WA community is very small, money will somehow kill the fun of the game, implementing such a thing is a big pain regarding legal stuff.
In europe you will need a license which is expensive, and hard to get. I don't know about other countries, but some may just not allow gambling.
Also, you will need to manage anti-fraud, anti-cheat, disputes, money chargeback, money transfert, devises convert, etc. It needs staff, skills, development.
This game is not ready (and probably will never be) to manage money stuff. In some schemes like TTRR, the game does not and cannot know who is the real winner of the game.
So, you could try to implement such a thing but it would be a very long job, and it would fail for sure with no result !
Good luck