How to set up hotspot mikrotika so that there is no Internet when connected?

Question

Android

Hello
https://www.dropbox.com/s/o7dt09fce1vpi1h/IMG_4131...
Here in this video you can see that when you connect to the hotspot, the Captive portal jumps up and at the same time you automatically connect to wifi. That's just in wifi itself, I'll cut out the entire Internet.
How to make this automatic connection and so that the Internet is cut out.
Interested in the same to work on both android and ios.