Hi kesavan,
I hope your are doing great.
About the issue you are facing with twilio sms, there is an already existing public ticket about the same issue that has been closed.
That ticket is [here](https://support.gluu.org/authentication/4244/how-to-use-custom-authentication-scripts/), just follow the instructions provide.
For future request, please first search if there is not an existing ticket that can help.
Thanks!