Filter to adjust whether Two-Factor Authentication is applied to a logged-in user in Shield

adjust_2fa.php

<?php

add_filter( 'icwp-wpsf-user_subject_to_login_intent', function ( $bUserSubjectTo2FA, $oWpUser ) {

    /**
     * Insert Your logic here.
     * Parameter $oWpUser is a WP_User object.
     * Always return a boolean true/false from this function.
     * In this example, if User ID is 1, always apply 2FA rules
     */
    if ( $oWpUser->ID === 1 ) {
      $bUserSubjectTo2FA = true;
    }

    return $bUserSubjectTo2FA;
  },
  100, 2
);