mqtt/MqttServerApp1/MqttServerApp/Release/appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*",
  "MqttOption": {
    "UserName": "admin",
    "Password": "admin123456",
    "TcpPort": "1833",
    "WsPort": "8083"
  }
}