“Please don’t do that.”
“Because I said so/am the boss/am the leader/am your parent.”
This is about the worst thing you can say if you ever plan on gaining someone’s respect.
It is okay if it needs to be said in a hurry and is explained later. Sometimes, in a crunch, it is tough to take time to explain the “why” behind things when you are in-charge. In those situations, you just follow on trust.
There is a good chance that your team disagrees with your rationale when you get to explaining it. It matters, however, that there is a rationale and, more importantly, that it is explained.
But, if that is meant to be the answer with no further explanation, then some changes are in order.