title: Get a permanent URL from Google Cloud Storage?
body: <p>I have a scenario where a user can upload images to Firebase Storage, however I do not want them to be able to get a URL for these images (Copy Image Address).  Instead I want to provide them with a blob.</p>
  
  <p>When a user uploads the image client side, I get the download URL and store that in Firestore.  When the user wants to see the image, I have a cloud function that downloads that image, and sends it to the user as a blob.</p>
  
  <p>This works great for images the user uploads, however I also have a cloud function that is triggered automatically when an image is uploaded and generates a thumbnail.</p>
  
  <p>How do I go about getting a <strong>permanent</strong> download URL from a Cloud Function/Node server for this generated image?  I can get a signed one, but it's not what I need</p>