Erro na conexão com o firebase

Guys to seguindo esse video no link abaixo para conseguir usar a API do firebase na unity, para usar o banco de dados dele 
 https://www.youtube.com/watch?v=WjWHVye4kxo

só que ta dando um erro na conexão com o firebase alguem sabe o que é?

Código:

7/5/2018 5:48:56 AM [Error] WebSocket: ws_1 - could not connect
System.Net.Sockets.SocketException: Uma tentativa de conexão falhou porque o componente conectado não respondeu
corretamente após um período de tempo ou a conexão estabelecida falhou
porque o host conectado não respondeu.

  at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP, Boolean requireSocketPolicy) [0x00000] in <filename unknown>:0
  at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x00000] in <filename unknown>:0
  at System.Net.Sockets.TcpClient.Connect (System.Net.IPEndPoint remote_end_point) [0x00000] in <filename unknown>:0
  at Firebase.Database.Internal.TubeSock.WebSocket.CreateSocket () [0x00000] in <filename unknown>:0
UnityEngine.Debug:LogError(Object)
Firebase.Platform.FirebaseLogger:LogMessage(PlatformLogLevel, String)
Firebase.Unity.UnityLoggingService:LogMessage(PlatformLogLevel, String)
Firebase.Database.Internal.Logging.DefaultLogger:Error(String, String)
Firebase.Database.Internal.Logging.DefaultLogger:OnLogMessage(Level, String, String, Int64)
Firebase.Database.Internal.Logging.LogWrapper:Error(String, Exception)
Firebase.Database.Internal.TubeSock.WebSocket:LogError(String, Exception)
Firebase.Database.Internal.TubeSock.WebSocket:CreateSocket()
Firebase.Database.Internal.TubeSock.WebSocket:RunReader()
Firebase.Database.Internal.TubeSock.Runnable101:Run()
Google.Sharpen.Thread:InternalRun()


Código:

7/5/2018 5:48:56 AM [Error] WebSocket: ws_1 - WebSocketException during handshake
Firebase.Database.Internal.TubeSock.WebSocketException: unknown host: monster-online.firebaseio.com ---> System.Net.Sockets.SocketException: Uma tentativa de conexão falhou porque o componente conectado não respondeu
corretamente após um período de tempo ou a conexão estabelecida falhou
porque o host conectado não respondeu.

  at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP, Boolean requireSocketPolicy) [0x00000] in <filename unknown>:0
  at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x00000] in <filename unknown>:0
  at System.Net.Sockets.TcpClient.Connect (System.Net.IPEndPoint remote_end_point) [0x00000] in <filename unknown>:0
  at Firebase.Database.Internal.TubeSock.WebSocket.CreateSocket () [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at Firebase.Database.Internal.TubeSock.WebSocket.CreateSocket () [0x00000] in <filename unknown>:0
  at Firebase.Database.Internal.TubeSock.WebSocket.RunReader () [0x00000] in <filename unknown>:0
UnityEngine.Debug:LogError(Object)
Firebase.Platform.FirebaseLogger:LogMessage(PlatformLogLevel, String)
Firebase.Unity.UnityLoggingService:LogMessage(PlatformLogLevel, String)
Firebase.Database.Internal.Logging.DefaultLogger:Error(String, String)
Firebase.Database.Internal.Logging.DefaultLogger:OnLogMessage(Level, String, String, Int64)
Firebase.Database.Internal.Logging.LogWrapper:Error(String, Exception)
Firebase.Database.Internal.TubeSock.WebSocket:LogError(String, Exception)
Firebase.Database.Internal.TubeSock.WebSocket:RunReader()
Firebase.Database.Internal.TubeSock.Runnable101:Run()
Google.Sharpen.Thread:InternalRun()


Hey, vi relatos que como o Firebase mudou um pouco, agora é necessário autenticação.
Também, por causa dos comentários do vídeo que você mostrou..