patch https://{Domain}/api/iacp/v3/accounts//blob-settings
Update account blob settings credentials.
It's also possible to override the project, bucket, and encryption key if the Scalr account
is empty.
Once the account has at least one blob (e.g. state, configuration, log) stored
in Scalr, the project, bucket and encryption key attributes become immutable and
API will return 409 on any attempt to modify them.