403 Error on FilesRouter #1384

I am using an afterDelete hook to handle deleting a File that is included in each object. From the hook I am using the following the code.

    Parse.Cloud.httpRequest({
        url: fileUrl,
        method: 'DELETE',
    }).then(function(response) {
        console.log(response);
    }, function(error) {
        console.log("AFTER DELETE ERROR!", error);
    });

However the DELETE is returning a 403 before the deleteHandler is even called. I see that the FileRouter is using a enforceMasterKey method but I am unsure how to alter my request to use the masterkey as Parse.Cloud.useMasterKey(); did not work.