private ValidationResult Valid()
        {
            var result = new ValidationResult
            {
                IsError = false
            };

            return result;
        }
        private ValidationResult Invalid(ErrorTypes errorType = ErrorTypes.User, string error = Constants.AuthorizeErrors.InvalidRequest)
        {
            var result = new ValidationResult
            {
                IsError = true, 
                Error = error, 
                ErrorType = errorType
            };

            return result;
        }