How to fix ngrok reconnecting (x509 certificate signed by unknown authority)

In our forge learning tutorial sample for listening to callbacks we use ngrok, some developers are facing  "x509: certificate signed by unknown authority".

To fix this you need to create a configuration file `ngrok.yml`, the detail documentation of configuration settings is provided here 

In this case we need to mention root_cas to 'Trusted'

root_cas: trusted

This question has been asked in stackoverflow 

Following gif shows how to do it.