Need help removing recessed canister light without a screw

New idea: I looked at various photos of the fixture. From the inside you can see the 4 spring clips. You need to lever under each clip at the end farthest away from the bezel. Use a tack puller or other bent tool like a cotter pin remover. To get the distance you might use a bar or fat screwdriver under your lever tool. The spring clip is designed to lock-snap into its final position to press against the top of the ceiling board. Looks like my suggestion is spreading even before I finish typing it.

I found this picture of H572RICAT in a Halo catalog

and then I scribbled on it...

To remove the fitting you need to withdraw the curved springs at the base, a flat bladed tool may be used to lever the top part of the vertical part of the spring into the can

Doing this should allow the fitting to be removed and the mains cable accessed.