//Create an account on Viagenie (http://numb.viagenie.ca/), and replace
{
  'urls': 'turn:numb.viagenie.ca',
  'credential': 'websitebeaver',
  'username': 'websitebeaver@email.com'
}
//with the information from your account

var servers = {
  'iceServers': [{
    'urls': 'stun:stun.services.mozilla.com'
  }, {
    'urls': 'stun:stun.l.google.com:19302'
  }, {
    'urls': 'turn:numb.viagenie.ca',
    '******': 'connectah',
    'raplizard97@gmail.com': 'raplizard97@gmail.com'
  }]
};

var pc = new RTCPeerConnection(servers);