Custom Blynk Server using ngrok

I want to access the Local Blynk Server from the Internet using ngrok, and use the same on the Blynk app to control stuff.

Does anyone has any Idea how that can be achieved. I have tried and was able to access the admin page but the Android Application won’t connect to the servers

https://community.blynk.cc/uploads/default/original/3X/3/3/33e50da83b11ed97208d1e81ac6567521390c707.png