Added shop url into wp admin new user interface

functions.php

<?php
// Add this actions
add_action( 'user_new_form', 'add_seller_store_field', 10 );
add_action( 'edit_user_created_user', 'add_shop_url_for_seller' , 10, 2);
// Add this filter
add_filter( 'user_profile_update_errors', 'check_fields_add_new_user', 10, 3 );

function add_shop_url_for_seller( $user_id, $notify ) {
    if ( ! $user_id ) {
        return;
    }

    $user = new WP_User( $user_id );

    if ( isset( $_POST['dokan-admin-add-new-user-store-url'] ) && $_POST['dokan-admin-add-new-user-store-url'] == 'yes' ) {
        if ( in_array( 'seller', $user->roles ) ) {
            if ( isset( $_POST['shopurl'] ) && !empty( $_POST['shopurl'] ) ) {
                wp_update_user( array( 'ID' => $user_id, 'user_nicename' => sanitize_title( $_POST['shopurl'] ) ) );
            }
        }
    }
}

function check_fields_add_new_user( $errors, $update, $user ) {
    $role = $_POST['role'];

    if ( isset( $_POST['dokan-admin-add-new-user-store-url'] ) && $_POST['dokan-admin-add-new-user-store-url'] == 'yes' ) {
        if ( $role == 'seller' ) {
            if ( isset( $_POST['shopurl'] ) && empty( $_POST['shopurl'] ) ) {
                $errors->add( 'shop_url', __( '<strong>ERROR</strong>: Shop url required for seller.', 'dokan' ) );
            }
        }
    }

    return $errors;
}

function add_seller_store_field( $flag ) {
    if ( 'add-new-user' != $flag ) {
        return;
    }
    ?>
    <table class="form-table seller-store-table">
        <tr>
            <th><label for="seller-url"><?php _e( 'Shop URL', 'dokan' ); ?></label></th>
            <td class="form-row">
                <input type="text" class="input-text form-control" name="shopurl" id="seller-url"/>
                <input type="hidden" name="dokan-admin-add-new-user-store-url" value="yes">
                <strong id="url-alart-mgs"></strong>
                <small><?php echo home_url() . '/' . dokan_get_option( 'custom_store_url', 'dokan_general', 'store' ); ?>/<strong id="url-alart"></strong></small>
            </td>
        </tr>
    </table>
    <style>
        table.seller-store-table td.form-row small{
            display: block;
            margin-top: 4px;
        }

        table.seller-store-table td.form-row #url-alart-mgs.text-danger {
            margin-left: 4px;
            color: #b94a48;
        }

        table.seller-store-table td.form-row #url-alart-mgs.text-success {
            margin-left: 4px;
            color: #468847;
        }

    </style>
    <script>
        ;(function($){
            var xhr ,timeout;

            $('table.seller-store-table').on('keyup', '#seller-url', function(e) {
                $('#url-alart').text( $(this).val() );
            });

            $('table.seller-store-table').on('keyup', '#seller-url', function() {
                var self = $(this),
                ajaxUrl = '<?php echo admin_url( 'admin-ajax.php' ); ?>'
                data = {
                    action : 'shop_url',
                    url_slug : self.val(),
                    _nonce : '<?php echo wp_create_nonce( 'dokan_reviews' ); ?>'
                };

                if ( self.val() === '' ) {
                    $( 'input#createusersub' ).attr('disabled', false);
                    $( '#url-alart-mgs' ).html('');
                    return;
                }

                $( 'input#createusersub' ).attr('disabled', true);
                // var row = self.closest('.form-row');
                // row.block({ message: null, overlayCSS: { background: '#fff', opacity: 0.6 } });


                clearTimeout(timeout);

                if( xhr ) {
                    xhr.abort();
                }

                timeout = setTimeout(function(){
                    xhr = $.post( ajaxUrl, data, function(resp) {

                        if ( resp == 0){
                            $('#url-alart').removeClass('text-success').addClass('text-danger');
                            $('#url-alart-mgs').removeClass('text-success').addClass('text-danger').text('Not Available');

                        } else {
                            $('#url-alart').removeClass('text-danger').addClass('text-success');
                            $('#url-alart-mgs').removeClass('text-danger').addClass('text-success').text('Available');
                            $( 'input#createusersub' ).attr('disabled', false);
                        }

                    } );
                },150);

            });

        })(jQuery)
    </script>
    <?php
}