The answer is yes & no. You can give him access to your Minehut Panel by giving him the login info to it. He will have access to everything such as Market purchases, purchase history, your credits and etc. If you trust him then I would say sure, let him access it. But if you don't, then don't.
I am sure Minehut will add some kind of feature that allows your friends to access a certain server that you own in the future. We just have to be patient for now.