AddRecipientToList
Adds a recipient to a list.
Input
| Name | Type | Required | Description |
| ListId | String | True | The unique identifier for the list. |
| RecipientId | String | True | The Id of the recipient. |
| AccountId | String | False | The ID of the account. |
| SubuserUsername | String | False | The username of the subuser. |
Result Set Columns
| Name | Type | Description |
| Success | String | Whether or not the recipient was successfully added to the list. |