public void Should_Have_Error_When_CustomerId_Is_Null()
            {
                var deleteCustomerTokenRequest = new DeleteCustomerTokenRequest
                {
                    CustomerId = null
                };

                _validator.ShouldHaveValidationErrorFor(x => x.CustomerId, deleteCustomerTokenRequest);
            }
            public void Should_Have_Error_When_AccountToken_Is_Null()
            {
                var deleteCustomerTokenRequest = new DeleteCustomerTokenRequest
                {
                    AccountToken = null
                };

                _validator.ShouldHaveValidationErrorFor(x => x.AccountToken, deleteCustomerTokenRequest);
            }