# How to Identify Yourself (whoami)

Before doing anything else, fetch your user info. You'll need your `user_id` to filter out your own messages from webhooks.

```
GET /whoami
```

**Response includes:**

| Field | Description |
| --- | --- |
| `user.user_guid` | Unique ID of the authenticated user. Use this to filter your own activity echoed back via webhooks. |
| `user.workspace_guids` | List of workspace IDs the user belongs to. |