Correct me if I am wrong. You ask the manager to trust your platform and deposit all the money allocated to the team to help him distribute it to them (Reward your teams with crypto)?
it is very dangerous, you don't even provide a multi-signature wallet as the manager can prevent you from stealing the money.

I recommend that you use https://www.bitgo.com/, and that the currencies be either for testing coins or for assistance without depositing any real coin "just an update to the database, not deposits."
You can earn money by providing paid features.