NICE ONE! THX!
immediately I took a step forward again, just not there yet, defo valid password, double quotes no single !!! @json.txt !!! yes all in the detail, got it.... more testing and playing and learning to do...
I also get 'Warning: Couldn't read data from file "json.txt", this makes an empty POST.' as well but might have some ideas there..
any other finds? , the valid password ( is a 20 byte, 40 char hex string supplied in .upper()) also resolved using decodescript to an address.. but I think I am looking for a MD5 hash, almost as if it was a --Digest-Auth hash but Bitcoin stuck to Basic?..... the hunt continues...