The playerlist view creates a list of all the players by using a map function that looks for "player" records.

function (doc, meta) {
  if (doc.jsonType == "player") {
    emit(meta.id, null);
  }
}

This outputs a list of players in the format:

{
   "total_rows" : 81,
   "rows" : [
      {
         "value" : null,
         "id" : "Aaron0",
         "key" : "Aaron0"
      },
      {
         "value" : null,
         "id" : "Aaron1",
         "key" : "Aaron1"
      },
      {
         "value" : null,
         "id" : "Aaron2",
         "key" : "Aaron2"
      },
      {
         "value" : null,
         "id" : "Aliaksey0",
         "key" : "Aliaksey0"
      },
      {
         "value" : null,
         "id" : "Aliaksey1",
         "key" : "Aliaksey1"
      }
   ]
}