appsettings.json

{
  "ConnectionStrings": {
    "DefaultConnection": "Server=(localdb)\\mssqllocaldb;Database=aspnet-LINQ2DB_MVC_Core_5;Trusted_Connection=True;MultipleActiveResultSets=true"
  },
  "Authentication": {
    "Linq2db": {
      "ProviderName": "SqlServer" // Default is SqlServer
    },
    "GoogleSSO": {
      "ClientId": "", // --get this from https://console.developers.google.com/apis/credentials
      "Secret": "" // --get this from https://console.developers.google.com/apis/credentials
    },
    "Facebook": {
      "AppId": "", // --get this from https://developers.facebook.com/apps
      "AppSecret": "" // --get this from https://developers.facebook.com/apps
    },
    "Microsoft": {
      "ClientId": "", // -- get this from https://portal.azure.com/#blade/Microsoft_AAD_RegisteredApps/ApplicationsListBlade
      "ClientSecret": "" // -- get this from https://portal.azure.com/#blade/Microsoft_AAD_RegisteredApps/ApplicationsListBlade
    }
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "AllowedHosts": "*"
}