I'm trying to create a file-upload page using code. I've created an upload button, and I'm now trying to make a "submit" button to grab the file and save it in a collection. I'm using "startUpload()" to upload the file, but then the code keeps on running without waiting for it to actually upload, so it reaches the point where it saves it to the collection before there's anything to actually save. I've tried using "await" but it's not recognized. Is there a way to tell the code to wait for the file to upload?