| Name | Type | Description | Notes |
|---|---|---|---|
| string | The email address for the recipient, if the recipient has an associated email address. | [optional] | |
| object_id | string | The unique identifier for the recipient in the directory. | [optional] |
| at_libre_graph_recipient_type | string | When the recipient is referenced by objectId this annotation is used to differentiate `user` and `group` recipients. | [optional] [default to 'user'] |