Show Image from get_temporary_link in Apps.

I have specific dropbox folder that will include only one image at all time. My app needs to get this dropbox image and show this image in image element. Whenever dropbox image change, my app needs to reflect this updated image. 

I tried to get image using "files_get_temporary_link" API. I've got this json return. when I tried to paste "link" at address bar Ive got 404 error. Could someone tell me what I did wrong. Thank you.
 
Thank you so much.

{
  "metadata": {
    "name": "wallpaper.jpg",
    "path_lower": "/wallpaper.jpg",
    "path_display": "/wallpaper.jpg",
    "id": "id:s6F_A8pbzgAAAAAAAAAALg",
    "client_modified": "2018-07-17T08:57:12Z",
    "server_modified": "2018-07-17T08:57:24Z",
    "rev": "4d32bebe0",
    "size": 155060,
    "content_hash": "0746b8ba94f9672c23845080a01ab613445c5836aed3f445cecb09e7b68a3f71"
  },
  "link": "https://dl.dropboxusercontent.com/apitl/1/AABwcyhWG1ttuYxiN5s5OIYgaqAS86YBnRiQxpzjYNlFEGQhx38LtDIogy6c1wXjGUMVbAmHeSXx_P7bDfWt3-hVTHTBCKBbD-A-SHj0TTQEjEAW3Q8nrN-U-4OsghVsvFUhdMPeV7BCU5fiC_UC2VgrDyjMIV_Ve1072mPEJdR3tTqK-UqFytiHjcolGTapwVJtd0bGUHwNPpYrV0qJas5BZuBDICfs859JQWRBkluMi3dHUHmfFbtV4cgqNnvVomFPG8Gwpm36QQH6MkD_0xGmy-R9BYVXYd46sk3mdpX1Eg"
}