## Social authentication 
Claims that are contained in the token after authentication via a social network.
Presence of these claims does not depend on the user database.
| Claim | Type | Required | Description |
|  --- | --- | --- | --- |
| `provider` | string | Yes | Name of a social network used for authentication. |
| `id` | string | Yes | User ID in a social network. |
| `is_cross_auth` | boolean |  | Shows that the silent authentication request is in progress. |
| `social_access_token` | string |  | Social network account `access_token` parameter used for authentication. Contact your Account Manager to set up the feature. |
| `picture` | string (URL) |  | Link to the user profile picture in a social network. |
| `birthday` | date ([RFC3339](https://www.ietf.org/rfc/rfc3339.txt)) |  | User birth date in a social network. |
| `gender` | string |  | User gender in a social network. |
| `name` | string |  | User nickname in a social network. |