aspnetcore/samples/ApiAuthSample/appsettings.json

{
  "ConnectionStrings": {
    "DefaultConnection": "DataSource=app.db"
  },
  "IdentityServer": {
    "Clients": {
      "ApiAuthSampleSPA": {
        "Profile": "IdentityServerSPA"
      }
    }
  },
  "AllowedHosts": "*"
}