Problem of uploading image to dropbox shared link using url

I am trying to upload the image to the dropbox shared link using the URL  but I did not get the path of this shared link. I'm using the below code to get the metadata of the shared folder link but I did not get a path_lower in response.

dbx.sharingGetSharedLinkMetadata({url: req.body.reference})
    .then(function(response) {
        console.log(response);
        var pathname =  response.result.path_lower;
        dbx.filesUpload({path: "/"+pathname, contents: data})
            .then(function(response) {
            console.log(response);
            })
            .catch(function(error) {
                console.error(error);
            });
    
    })
    .catch(function(error) {
        console.error(error);
    });

I appreciate your help. Thank You.