Yeah but i have two issues with that, that only allows me to add some string in extra settings, not a players array, but my principal issue, is that those extra properties are setted at the moment of creating the server. But i need that to update to search for all the connected players and look at theirs scores.
(Thinking a little more, i could set that value with the mmr of the host, and then the new connections check for a proximity to that value before joining)
Regards.