Discussions

Hi. I'm trying to use the If-Modified-Since header, but it doesn't seem to work correctly. What do I do? Added "If-Modified-Since" to the contacts request header with the current date and time in the format "Fri, 17 Jan 2025 09:00:00 GMT". I expected a 304 code or an empty contact list, but instead I got all existing contacts. What am I doing wrong? Or is this header not implemented yet?