Pass http_proxy information to xarray.open_zarr

[loicdtx]

I'm trying to access a remote zarr store via my work network which uses a proxy. It seems that the requests go through aoihttp, which does not pick up proxy information from environment variables by default (HTTP_PROXY and HTTPS_PROXY are defined but ignored). I couldn't find any way to provide proxy information via xarray.open_zarr(). (I tried directly passing proxy='http://...' and trust_env=True hoping they would be picked up by kwargs and passed all the way to either session.request() or aiohttp.ClientSession() respectively but that did not work).
Any suggestions?