OBS allows you to control access permission for buckets. By default, only the creator of a bucket has READ and WRITE permission for the bucket. The creator can also set other access permission. For example, the creator can set a public-read access policy to grant READ permission to other users.
You can set an access control policy when creating a bucket, and modify or obtain the bucket access control list (ACL) using the PUT Bucket acl and GET Bucket acl operations.