Captcha counter increase

hey

i am using the build in captcha feature, and i have configured a Macro with a loop for my 2 factor authentication. the macro loop is configured for 3 loops and than the access policy reaches to the access policy deny. from my research i have seen that the counter for the captcha only increases when it reaches the policy deny. how can i increase the counter manually using iRule probably using event agent before the Macro loop terminal?

thanks