I'm trying to create a new customer through an API with square POS (squareup.com). Zapier could do this, but zapier takes minutes, and I need it to be instant as it's a customer pre-registration form I'm trying to create. While they wait in line, they can supply some basic information to speed up the checkout process. Square uses "bearer" authentication and formidable uses basic. I was given some guidance by a very helpful formidable person, but I think I'm stretching their capability or scope of support. I was directed to this "

Other authentication#

The Formidable API add-on is set up to send requests using Basic Authorization. Some other types of Authorization aren't built-in, but can be added with a hook. For example, some APIs require Bearer Authentication. If you need to communicate with an API that uses Bearer Authentication, you can add a Bearer header to the API request using this hook. Which lead me to this https://formidableforms.com/knowledgebase/formidable-api/#kb-customize-api-request-headers I copied the code into the functions.php file of my child theme.

add_action( 'rest_api_init', 'initialize_inclide_password_in_api' );
function initialize_inclide_password_in_api() {
    add_filter( 'frm_include_field_in_content', 'include_password_in_api', 10, 2 );
}

function include_password_in_api( $include, $field_value ) {
    $target_field_key = 'utv62'; // change this
    if (  $target_field_key === $field_value->get_field_key() ) {
        $include = true;
    }
    return $include;
}

I replaced utv62 with my field code, which contains the token. I feel like I'm missing something