Halo wars 2 Player Match History API

I would like to know why there is a need for a sub key in order to see the stat/info of match(es) you previously played. The stats are already shown at first but if you want to look back or if you would accidentally click A. You can’t see it anymore unless you have a sub key?

I’m sorry, but I’m afraid I don’t quite understand your question. This forum is for support for the Halo API at https://developer.haloapi.com/. Is that what you’re having trouble with? If not, I can direct you to a more appropriate forum. Thanks!