Rear camera glass popped clean off

I recently got a new Google pixel 3 a couple weeks ago and bought a new case for it aswell. One day i was playing basketball and it came out of my pocket and it dropped on the concrete. Now it was dark outside so it was hard to tell if anything happened to the camera but after I came back in I noticed that the camera glass was missing. The camera housing is fine the camera works as well as it did right out of the box and the glass surrounding it is fine, no cracks or anything. Does anyone know how what kind of things Google would do to fix this kind of thing and how much it would cost to get it repaired. I've read that it they would have to take the whole back of the phone off and replace it with a new one but I don't think this would be true especially since it just a small piece of glass covering the camera.