Create a shortcode on a Wordpress plugin (WC Vendors)

I have WC vendor install on my wordpress site and I need to create a new shortcode. I need you to add a filter here so you can choose the category you want ([login to view URL]) (for COMMUNIQUE in this page for exmple the category is "Agence de Publicité". Son I need a list with all the categories so you see only the list of the category choose. Here are the code : //////////////////////////// /* list of vendors * * @param $atts shortcode attributs */ public function wcv_vendorslistsort( $atts ) { $html = ''; extract( shortcode_atts( array( 'orderby' => 'registered', 'order' => 'ASC', 'per_page' => '12', 'columns' => '4', 'show_products' => 'no' ), $atts ) ); $paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1; $offset = ( $paged - 1 ) * $per_page; // Hook into the user query to modify the query to return users that have at least one product if ($show_products == 'yes') add_action( 'pre_user_query', array( $this, 'vendors_with_products') ); // Get all vendors $vendor_total_args = array ( 'role' => 'vendor', 'meta_key' => 'pv_shop_slug', 'meta_value' => '', 'meta_compare' => '>', 'orderby' => $orderby, 'order' => $order, ); if ($show_products == 'yes') $vendor_total_args['query_id'] = 'vendors_with_products'; $vendor_query = New WP_User_Query( $vendor_total_args ); $all_vendors =$vendor_query->get_results(); // Get the paged vendors $vendor_paged_args = array ( 'role' => 'vendor', 'meta_key' => 'pv_shop_slug', 'meta_value' => '', 'meta_compare' => '>', 'orderby' => $orderby, 'order' => $order, 'offset' => $offset, 'number' => $per_page, ); if ($show_products == 'yes' ) $vendor_paged_args['query_id'] = 'vendors_with_products'; $vendor_paged_query = New WP_User_Query( $vendor_paged_args ); $paged_vendors = $vendor_paged_query->get_results(); // Pagination calcs $total_vendors = count( $all_vendors ); $total_vendors_paged = count($paged_vendors); $total_pages = intval( $total_vendors / $per_page ) + ( $total_vendors % $per_page ); ob_start(); // Loop through all vendors and output a simple link to their vendor pages foreach ($paged_vendors as $vendor) { wc_get_template( '[login to view URL]', array( 'shop_link' => WCV_Vendors::get_vendor_shop_page($vendor->ID), 'shop_name' => $vendor->pv_shop_name, 'vendor_id' => $vendor->ID, 'shop_description' => $vendor->pv_shop_description, ), 'wc-vendors/front/', wcv_plugin_dir . 'templates/front/' ); } // End foreach $html .= '<ul class="wcv_vendorslist">' . ob_get_clean() . '</ul>'; if ($total_vendors > $total_vendors_paged) { $html .= '<div class="wcv_pagination">'; $current_page = max( 1, get_query_var('paged') ); $html .= paginate_links( array( 'base' => get_pagenum_link( ) . '%_%', 'format' => 'page/%#%/', 'current' => $current_page, 'total' => $total_pages, 'prev_next' => false, 'type' => 'list', )); $html .= '</div>'; } return $html; } ///////////////////////End//////////////// Right Now with this code I can create a page with a shortcode like [wcv_vendorslist show_products="no"] thas show me the list of all the vendor, but I have another table called "pv_merchant_category" and I would like to be able to create a page with a shortcode like [wcv_vendorslist show_products="no" category="Barber"] thas will show me only the list of the vendors in the "Barber" category!!