using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Firebase.Database; using Firebase.Database.Query; namespace DSACore.FireBase { public static class Database { static Database() { var auth = "ABCDE"; // your app secret var firebaseClient = new FirebaseClient( "", new FirebaseOptions { AuthTokenAsyncFactory = () => Task.FromResult(auth) }); } } }