Here is a sample script showing how you can use the server discovery API to get the servers associated with your runtime key.
// Initialize network APINetwork.Init(RuntimeSettings.instance.playToken);// Get the list of servers associated with the tokenvar network =World.DefaultGameObjectInjectionWorld.GetExistingSystem<NetworkSystem>();if (network.ConnectionAddresses!=null){foreach (var connection innetwork.ConnectionAddresses) {serverDropdown.options.Add(newDropdown.OptionData { text =string.Format("{0} {1}:{2}",connection.region,connection.ip,connection.port) }); }serverDropdown.value=serverDropdown.options.Count-1;}