following on from https://bsky.app/profile/jerry-shannon.bsky.social/post/3lcisatdppk2h
gdalinfo /vsigs/gcp-public-data-arco-era5/ar/full_37-1h-0p25deg-chunk-1.zarr-v3
ERROR 15: No valid GCS credentials found. For authenticated requests, you need to set GS_SECRET_ACCESS_KEY, GS_ACCESS_KEY_ID,
GS_OAUTH2_REFRESH_TOKEN, GOOGLE_APPLICATION_CREDENTIALS, or other configuration options, or create a /home/ubuntu/.boto file. Consult
https://gdal.org/en/stable/user/virtual_file_systems.html#vsigs-google-cloud-storage-files for more details. For unauthenticated requests
on public resources, set the GS_NO_SIGN_REQUEST configuration option to YES.