To display the list in the front end, simply use the following shortcode:

Ce produit ne dispose actuellement d’aucun client

 

Ce produit ne dispose actuellement d’aucun client

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Replace PRODUCT_ID with the ID of the product for which you want to display the customers. Use TRUE or FALSE to display the quantity. If you do not use any attributes, it will display the customers of the current product (on a product page), and it will not display the quantity.