function wpf_delete_user() {

    $post_data = apply_filters( 'wpf_crm_post_data', $_REQUEST );

    if ( empty( $post_data ) || empty( $post_data['contact_id'] ) ) {
        wp_die();
    }

    $args = array(
        'meta_key'   => wp_fusion()->crm->slug . '_contact_id',
        'meta_value' => $post_data['contact_id'],
        'fields'     => array( 'ID' ),
    );

    $users = get_users( $args );

    // If user is found
    if ( isset( $users[0] ) ) {

        wp_delete_user( $users[0]->ID );

    }

    do_action( 'wpf_api_success', $users[0]->ID, 'update' );

}

add_action( 'wpf_delete', 'wpf_delete_user' );