role
Sts role info under source logstore. role_arn and (access_key_id, access_key_secret) fill in at most one. If you do not fill in both, then you must fill in (kms_encrypted_access_key_id, kms_encrypted_access_key_secret, kms_encryption_access_key_id_context, kms_encryption_access_key_secret_context) to use KMS to get the key pair.