Nam Ngo

The proper way is to use python's abc, felt like it wasn't worth the effort.

I recall the docs says ID is preferred over phone number. Happy to merge if you prove me wrong :P

Please update the failing unit test.

> @damithsenanayake I did not use get_chat_history in my code. It seems to work fine without get_chat_history as long as you include memory=memory. Please correct me if that's not the...