| table | string | no | no | The table to store messages in. |
| string_columns | map[string]expression | no | no | A map of column keys to string values to store. |
| json_map_columns | map[string]string | no | no | A map of column keys to field paths pointing to value data within messages. |
| ttl | string | yes | no | An optional TTL to set for items, calculated from the moment the message is sent. |
| ttl_key | string | yes | no | The column key to place the TTL value within. |
| max_in_flight | int | yes | no | The maximum number of parallel message batches to have in flight at any given time. The value defaults to 64. |
| region | string | no | no | The AWS region to target. |
| endpoint | string | yes | no | Allows you to specify a custom endpoint for the AWS API. |
| credentials | credentials | no | no | Optional manual configuration of AWS credentials to use. More information can be found in the AWS Guide. |