There are two SIDs on twilio and you never manage to separate them properly in the documentation. So I think this is the same situation in your backend and the entire API-“solution”, that you offer. There’s an account sid starting with AC and there’s another one starting with SK. You don’t even mention it indirectly by writing those two letters at the beginning of each example, but you just write there an X. This way it remains unknown and one has to guess and try every possible combination in order to find out the right combination. So please clarify it in the documentation or at least in your backend, so one can get the right error messages in order to know, that he’s now using the wrong SID for that particular request.