public void deleteFAQ(FAQ faq, int q)
 {
     var filter = new BsonDocument("category", faq.Category);
     var update = Builders<BsonDocument>.Update
         .Set("questions", new BsonArray(faq.Questions))
         .Set("answers", new BsonArray(faq.Answers));
     FAQCollection.FindOneAndUpdateAsync(filter, update);
 }
 public void deleteCategory(FAQ faq)
 {
     var filter = new BsonDocument("category", faq.Category);
     FAQCollection.DeleteOneAsync(filter);
 }