title: Chat API to add and remove members automatically
body: <p>I'm working with a guy who uses telegram app to send bet tips on football matches. He wants the group to be private, right now he is adding and removing all members manually. The group is growing and now has more than 300 members which makes his job harder, what he wants is an automatic way of adding and removing members from the group . Is there any api that let me do this? I'm open to change to another chat app if it's needed. </p>