private async void Button_Clicked_Add_Question(object sender, EventArgs e)
{
var take_suggested_question_id = await firebaseHelper.FindLastSuggestedQuestionsID();
int suggested_question_id = take_suggested_question_id.ID;
await firebaseHelper.AddQuestion(txt_question_category.Text,
txt_question.Text, txt_correct_answear.Text, txt_wrong_answear1.Text,
txt_wrong_answear2.Text, txt_wrong_answear3.Text);
await DisplayAlert("Added Question", "Question has been added", "ok");
await firebaseHelper.DeleteSuggestedQuestion(suggested_question_id);
await Navigation.PushAsync(new VerifyQuestions());
}
