I'm programming a game in which I have to set a team based on the position of the player when the game starts. Can you help me?

var playerz = [];

room.onPlayerJoin = function () {
  playerz.push({
    name: player.name,
    id: player.id,
    team: 0,
    position: { x: null, y: null },
  });

room.onGameStart = function () {
  TeamRed = playerz.filter(
    (p) => p.position["x"] === 103 && p.position["y"] === -178.5
  );
  TeamYellow = playerz.filter(
    (p) => p.position["x"] === -206 && p.position["y"] === 0
  );
  TeamBlue = playerz.filter(
    (p) => p.position["x"] === 103 && p.position["y"] === 178.5
  );
};

What I've done is to rename the player based on the position, but I actually need to rename the team based on these positions. Of course, I could do it manually verifying the position of each player but in some maps players are more than 10 so I need to do it automatically. Can someone help me?

P.S. Never mind about player, it's a built-in-game parameter.