Connecting server with playfab

I am trying to realtime cloud server with playfab (JavaScript API).
Using appID generated by playfab, I can get Photon Authentication Token, but I have no idea how to setCustomAuthentication.

Below code results in "Client: Error: 3101 NameServer authentication failed"
var client = new Photon.LoadBalancing.LoadBalancingClient(Photon.ConnectionProtocol.Ws, APPID, "1.0");
var authParam = "username=user1" + "&token=" + TOKEN;
client.setCustomAuthentication(authParam, Photon.LoadBalancing.Constants.CustomAuthenticationType.Custom);
client.connectToRegionMaster("EU");

Can anybody help me?