odc.stac.configure_rio(
aws={
"endpoint_url": "eodata.dataspace.copernicus.eu",
"aws_access_key_id": credentials.access_key,
"aws_secret_access_key": credentials.secret_key,
"region_name": "default",
},
verbose=True,
cloud_defaults=True,
AWS_VIRTUAL_HOSTING=False,
)
having this configuration was sufficient for me to access data from CDSE custom bucket.