private async void btnSignIn_Clicked(object sender, EventArgs e)
        {
            //TODO Checks entered credentials and takes user to homescreen
            string email    = txtEmail.Text;
            string password = txtPassword.Text;
            FirebaseDataHandler dataHandler = FirebaseDataHandler.GetDataHandler();
            bool loggedIn = await dataHandler.AuthenticateWithEmail(email, password);

            if (loggedIn)
            {
                MainPage mainPage = new MainPage();
                mainPage.Detail      = new NavigationPage(new RoutesLogPage());
                App.Current.MainPage = mainPage;
            }
            else
            {
                await DisplayAlert("Login Failed", "Invalid Login Details", "OK");
            }
        }
 private void Start()
 {
     singleton        = this;
     identityEndpoint = "https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?key=" + API_KEY;
 }