In the following code I make a post request to a firebase database, I was wondering if there is a way to put an id or name to the posted item, that way I can call from my code, i try whit PUT but that delete all the other elements

fetch(
      "https://prodcutosjuangranel-default-rtdb.firebaseio.com/productos.json",
      {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(producto),
      }
    ).then(() => {
      console.log("ok");
    });