create_vendor on regular registration

<?php
add_action( 'user_register', 'custom_registration_save', 10, 1 );

function custom_registration_save( $user_id ) {
$user = wp_get_current_user( $user_id );
$username = $user->user_login;
$email = $user->user_email;

// Ensure vendor name is unique
    if ( term_exists( $username, 'shop_vendor' ) ) {
        $append     = 1;
        $o_username = $username;

        while ( term_exists( $username, 'shop_vendor' ) ) {
            $username = $o_username . $append;
            $append ++;
        }
    }

// Create the new vendor
    $return = wp_insert_term(
        $username,
        'shop_vendor',
        array(
            'description' => sprintf( __( 'The vendor shop for %s', 'localization-domain' ), $username ),
            'slug'        => sanitize_title( $username )
        )
    );
if ( is_wp_error( $return ) ) {
        wc_add_notice( __( '<strong>ERROR</strong>: Unable to create the vendor account for this user. Please contact the administrator to register your account.', 'localization-domain' ), 'error' );
    } else {
// Update vendor data
        $vendor_data['paypal_email'] = $email;
        $vendor_data['commission']   = '50';
        $vendor_data['admins'][]     = $user_id;

        update_option( 'shop_vendor_' . $return['term_id'], $vendor_data );

        $caps = array(
            "edit_product",
            "read_product",
            "delete_product",
            "edit_products",
            "edit_others_products",
            "delete_products",
            "delete_published_products",
            "delete_others_products",
            "edit_published_products",
            "assign_product_terms",
            "upload_files",
            "manage_bookings",
        );

        $skip_review = get_option( 'woocommerce_product_vendors_skip_review' ) == 'yes' ? true : false;
        if( $skip_review ) {
            $caps[] = 'publish_products';
        }

        $caps = apply_filters( 'product_vendors_admin_caps', $caps );


        foreach( $caps as $cap ) {
            $user->add_cap( $cap );
        }
    }
}
?>