{
  "iceServers": [
    {
      "urls": [
        "stun:stun.l.google.com:19302",
        "stun:stun1.l.google.com:19302",
        "stun:stun2.l.google.com:19302"
      ]
    },
    {
      "urls": "turn:openrelay.metered.ca:80",
      "username": "openrelayproject",
      "credential": "openrelayproject"
    },
    {
      "urls": "turn:openrelay.metered.ca:443",
      "username": "openrelayproject", 
      "credential": "openrelayproject"
    }
  ]
}