public bool PostCreditCard(CreditCard creditCard)
        {
            //if (!ModelState.IsValid)
            //{
                //return BadRequest(ModelState);
            //}                                 
            
            string decryptedCreditCardNumber = GetDecrypt(creditCard.CreditCardNumber);
            string decryptedCreditCardPin = GetDecrypt(creditCard.CreditCardPin);
            bool IsValid = db.CreditCards.Count(e => (e.CreditCardNumber == decryptedCreditCardNumber) && (e.CreditCardPin == decryptedCreditCardPin)) > 0;
            
            if (IsValid)
            {
                //Update database

                //send back yes
            }
            else
            { 
                //send back false
            }

          //  return IsValid;

            return IsValid;

            //db.CreditCards.Add(creditCard);
            //await db.SaveChangesAsync();

            //return CreatedAtRoute("DefaultApi", new { id = creditCard.Id }, creditCard);
        }
        public async Task<IHttpActionResult> PutCreditCard(int id, CreditCard creditCard)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != creditCard.Id)
            {
                return BadRequest();
            }

            db.Entry(creditCard).State = EntityState.Modified;

            try
            {
                await db.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!CreditCardExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return StatusCode(HttpStatusCode.NoContent);
        }