set up Plivo SMS gateway in Sophos XG [SMS gateway]

 I have some problem with plivo and Sophos XG.

The plivo SMS gateway do support rest API.

It support only Basic Authentication. As I see in Sophos XG configuration for SMS gateway I can't find to use this.

However what I have manage to do is test the connection and I do receive SMS.

The url is: https://{authid}:{authtoken}@api.plivo.com/v1/Account/{authid}/Message/

The testing works fine but when I click on the save button I receive follow error: You must enter a valid URL value for URL

So somehow Sophos XG is checking the url and it doesn't like the end of URL

If it try to use this url: https://{authid}:{authtoken}@api.plivo.com/v1/Account/{authid}/Message  (without slash at the end) it accept the url when I click save.

But of course the SMS will not work because the url is wrong.