public IActionResult SHA256Encrypt([FromBody] HashViewModel viewModel)
        {
            SHA256Hash hash = new SHA256Hash();


            string encrypted = "";

            try
            {
                encrypted = hash.Encrypt(viewModel.Message);
            }
            catch (NullReferenceException)
            {
            }
            catch (Exception)
            {
                return(BadRequest(new { Result = false, Message = Text.InvalidCharacter }));
            }
            return(Json(encrypted));
        }