## Update Fraud Detection Settings

`client.fraud.update(FraudUpdateParamsparams, RequestOptionsoptions?): FraudSettings`

**put** `/zones/{zone_id}/fraud_detection/settings`

Update Fraud Detection settings for a zone.

Notes on `username_expressions` behavior:

- If omitted or set to null, expressions are not modified.
- If provided as an empty array `[]`, all expressions will be cleared.

### Parameters

- `params: FraudUpdateParams`

  - `zone_id: string`

    Path param: Identifier.

  - `user_profiles?: "enabled" | "disabled"`

    Body param: Whether Fraud User Profiles is enabled for the zone.

    - `"enabled"`

    - `"disabled"`

  - `username_expressions?: Array<string>`

    Body param: List of expressions to detect usernames in write HTTP requests.

    - Maximum of 10 expressions.
    - Omit or set to null to leave unchanged on update.
    - Provide an empty array `[]` to clear all expressions on update.
    - Invalid expressions will result in a 10400 Bad Request with details in the `messages` array.

### Returns

- `FraudSettings`

  - `user_profiles?: "enabled" | "disabled"`

    Whether Fraud User Profiles is enabled for the zone.

    - `"enabled"`

    - `"disabled"`

  - `username_expressions?: Array<string>`

    List of expressions to detect usernames in write HTTP requests.

    - Maximum of 10 expressions.
    - Omit or set to null to leave unchanged on update.
    - Provide an empty array `[]` to clear all expressions on update.
    - Invalid expressions will result in a 10400 Bad Request with details in the `messages` array.

### Example

```node
import Cloudflare from 'cloudflare';

const client = new Cloudflare({
  apiToken: process.env['CLOUDFLARE_API_TOKEN'], // This is the default and can be omitted
});

const fraudSettings = await client.fraud.update({
  zone_id: '023e105f4ecef8ad9ca31a8372d0c353',
  username_expressions: [],
});

console.log(fraudSettings.user_profiles);
```

#### Response

```json
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "user_profiles": "disabled",
    "username_expressions": [
      "http.request.body.form[\"username\"][0]",
      "lookup_json_string(http.request.body.raw, \"username\")"
    ]
  }
}
```