# PasskeyLoginBeginRequest

> The PasskeyLoginBeginRequest object in the Guv API.

## Fields

| Field | Type | Description |
| --- | --- | --- |
| `email` | string (email) | Optional; omit for discoverable credentials (passkey autofill). |

\* always present

## Example

```json
{
  "email": "ada@example.co.uk"
}
```

## Used by

- [Start signing in with a passkey](/docs/api/auth/#start-signing-in-with-a-passkey)