I previously used a service, where I could receive user data from an xml file on the verification service server, if the user verified his phonenumber. as this service is not working that stable, i'm trying to get into sinch (as im not that pro). so in general:
is there an xml file on sinch, where my verified users are stored?
There is no XML file in sinch, you get a callback every time a verification occurs.
https://www.sinch.com/docs/verification/rest/#verificationcallbackapi