public async Task Validate_WhenCampaignHasMoreThan32Characters_ShouldFail()
        {
            // Arrange
            var createAdIdRequest = new CreateAdIdRequest()
            {
                Campaign = "This text has more than 32 characters."
            };

            // Act
            var validationResult = await _validator.ValidateAsync(createAdIdRequest);

            // Assert
            validationResult.IsValid.Should().BeFalse();
        }
        public async Task Validate_WhenCampaignHasLessThan32Characters_ShouldSucceed()
        {
            // Arrange
            var createAdIdRequest = new CreateAdIdRequest()
            {
                Campaign = "This text has exactly 32 chars."
            };

            // Act
            var validationResult = await _validator.ValidateAsync(createAdIdRequest);

            // Assert
            validationResult.IsValid.Should().BeTrue();
        }