My current setup is:
sdk.development.default_output_uri=< None > # no port, no bucket
sdk.aws.s3.key=<my-access-key>
sdk.aws.s3.secret=<my-secret-key>
sdk.aws.s3.region=<my-region> # I think it can be skipped but somewhere in the clearml code it says that it must be specified if it's not default like us-east-1 or something
sdk.aws.s3.credentials.bucket=<my-bucket> # just a bucket name
sdk.aws.s3.credentials.host=< None : 443> # the same as output_uri and plugged 443 port in
sdk.aws.s3.credentials.key=<my-access-key>
sdk.aws.s3.credentials.secret=<my-secret-key>
sdk.aws.s3.credentials.region=<my-region>
sdk.aws.s3.credentials.secure=true