Using a background image from the cloud

Hello. New to the group. I am trying to use a background image that I have stored in the cloud, in google photos. This is what I am doing:
background-image: url(“”);
I got the link by using the “create link” option in google photos. (Its not realy blah blah blah)
I know the syntax is right because when I put other links in the url they work so there must be some issue with using google photos.
Any ideas?