External hosts in Businesslogic exposed from localhost

I have a third party software app running on my localhost.it is exposed as a REST service. I wont be able to put this app on Backendless.It has to be an external service.
So I am exposing this localhost as a public host using ngrok tunnel. Everytime i stop and start my machine or ngrok…It creates a new ngrok public machine name.
I am configuring this host name in App setttings --> External Hosts in Business Logic.
Do i have to get approval for my ngrok host name everytime i get a new generated public hostname.?
Is there any other way during developement/testing ?

Do i have to get approval for my ngrok host name everytime i get a new generated public hostname.?

Yes, you do. When you add an external host, we provision it for the security policy for your backend. When domain name changes, the security policy must be re-provisioned.

Regards,
Mark

Alright…Thanks for quick turn around.