How to prevent flash messages from displaying whenever there are validation errors

[RoKrypto]

Greetings. I'm developing a form with Snowboard. I managed to disable the alert message I got every time there's some validation error, but I couldn't get to disable the flash messages. I thought setting "flash" to "false" in the options object "quoterRequestOptions" would be enough (or so I thought the documentation said) but no. I'll leave the code so someone can point out what I'm doing wrong. Thank you in advance.

const quoterFormBtn = document.getElementById('cotizador-form-contacto-btn'),
    quoterContactForm = document.getElementById('quoter-contact-form'),
    quoterNameInput = document.getElementById('input-nombre'),
    quoterEmailInput = document.getElementById('input-correo'),
    quoterPhoneInput = document.getElementById('input-telefono'),
    quoterContactFormFailureMsg = document.getElementById('quoter-contact-form-failure'),
    quoterContactFormSuccessMsg = document.getElementById('quoter-contact-form-success'),
    emailRegEx = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/,
    digitsOnlyRegEx = /^\d+$/,
    errorsMessages = {
        name: '',
        email: '',
        phoneNumber: ''
    };

function cleanErrorWarnings (errorCSSSelector) {
    const errorMessagesElements = Array.from(quoterContactForm.querySelectorAll(errorCSSSelector));
    if(errorMessagesElements.length > 0) {
        errorMessagesElements.forEach(errMsgEl => errMsgEl.remove());
        quoterContactFormFailureMsg.style.display = 'none';
        quotationAdjustCurrentSlideHeight();
    }

    errorsMessages.name = '';
    errorsMessages.email = '';
    errorsMessages.phoneNumber = '';
}

function showErrorMessage(input, message) {
    input.insertAdjacentHTML('afterend', `<p class="input-field__validation-message force-block">${message}</p>`);
    quoterContactFormFailureMsg.style.display = 'block';
    quotationAdjustCurrentSlideHeight();
}

const quoterRequestOptions = {
    form: quoterContactForm,
    browserValidate: true,
    error: function (data, request) {
        //Set form free from old error messages if it isn't 1st request
        cleanErrorWarnings('.input-field__validation-message');

        //Generate error messages and handle them
        const errorMessagesObj = request.responseData['X_WINTER_ERROR_FIELDS'];
        if('input-nombre' in errorMessagesObj) quoterNameInput.insertAdjacentHTML('afterend', `<p class="input-field__validation-message force-block">${errorMessagesObj['input-nombre'][0]}</p>`);
        if('input-correo' in errorMessagesObj) quoterEmailInput.insertAdjacentHTML('afterend', `<p class="input-field__validation-message force-block">${errorMessagesObj['input-correo'][0]}</p>`);
        if('input-telefono' in errorMessagesObj) quoterPhoneInput.insertAdjacentHTML('afterend', `<p class="input-field__validation-message force-block">${errorMessagesObj['input-telefono'][0]}</p>`);

        quoterContactFormFailureMsg.style.display = 'block';
        quotationAdjustCurrentSlideHeight();
    },
    success: function (data, request) {
        //Set form free from old error messages if it isn't 1st request
        cleanErrorWarnings('.input-field__validation-message');

        quoterContactForm.reset();
        
        quoterContactFormSuccessMsg.style.display = 'block';

        quotationAdjustCurrentSlideHeight();

        quoterContactFormSuccessMsg.scrollIntoView({behavior: 'smooth', block: 'end'});

        setTimeout(function(){
            quoterContactFormSuccessMsg.style.display = 'none';
            quotationAdjustCurrentSlideHeight();
        }, 10000);
    }
};

class AlertDisabler extends Snowboard.Singleton
{
    listens() {
        return {
            ajaxErrorMessage: 'disableAlertMessages'
        };
    }

    //Prevents alert each time there's an error
    disableAlertMessages(message, request) {
        return false
    }
}

Snowboard.addPlugin('alert__disabler', AlertDisabler);

quoterFormBtn.addEventListener('click', () => {
    cleanErrorWarnings('.input-field__validation-message');
    
    quoterFormBtn.classList.add('wn-loading');

    if (quoterNameInput.value === '') {
        errorsMessages.name = 'El campo es requerido.';
        showErrorMessage(quoterNameInput, errorsMessages.name);
    }

    if (quoterEmailInput.value === '') {
        errorsMessages.email = 'El campo es requerido.';
        showErrorMessage(quoterEmailInput, errorsMessages.email);
    } else {
        if (!emailRegEx.test(quoterEmailInput.value)) {
            errorsMessages.email = 'El campo requiere un valor con formato de correo electrónico.';
            showErrorMessage(quoterEmailInput, errorsMessages.email);
        }
    }

    if (quoterPhoneInput.value === '') {
        errorsMessages.phoneNumber = 'El campo es requerido.';
        showErrorMessage(quoterPhoneInput, errorsMessages.phoneNumber);
    } else {
        if (!digitsOnlyRegEx.test(quoterPhoneInput.value)) {
            errorsMessages.phoneNumber = 'El campo requiere un valor con formato numérico.';
            showErrorMessage(quoterPhoneInput, errorsMessages.phoneNumber);
        }
    }

    if (errorsMessages.name === '' && errorsMessages.email === '' && errorsMessages.phoneNumber === '') {
        Snowboard.request(quoterFormBtn, quoterContactForm.dataset.request, quoterRequestOptions);
    }
    
    quoterFormBtn.classList.remove('wn-loading');
});

[RoKrypto]

I found the solution after several rounds of experiments. I just needed to remove the plugins "flash" and "flashlistener" before adding "AlertDisabler".

Snowboard.removePlugin('flash');
Snowboard.removePlugin('flashlistener');