code: function main(kayn) {
      const config = {
          query: 420,
          champion: 67,
          season: 7,
      }
  
      kayn.Summoner.by.name('Contractz').callback(function(error, summoner) {
          // Note that the grabbing of a matchlist is currently limited by pagination.
          // This API request only returns the first list.
          kayn.Matchlist.by
              .accountID(summoner.accountId)
              .region('na')
              .query(config)
              .callback(function(error, matchlist) {
                  console.log(matchlist.totalGames, matchlist.matches.length)
              })
      })
  }
docs: Out of a player's ranked matchlist, grabs every match where they played a certain champion.