## Create Leaked Credential Checks Custom Detection

`client.leakedCredentialChecks.detections.create(DetectionCreateParamsparams, RequestOptionsoptions?): DetectionCreateResponse`

**post** `/zones/{zone_id}/leaked-credential-checks/detections`

Create user-defined detection pattern for Leaked Credential Checks.

### Parameters

- `params: DetectionCreateParams`

  - `zone_id: string`

    Path param: Defines an identifier.

  - `password?: string`

    Body param: Defines ehe ruleset expression to use in matching the password in a request.

  - `username?: string`

    Body param: Defines the ruleset expression to use in matching the username in a request.

### Returns

- `DetectionCreateResponse`

  Defines a custom set of username/password expressions to match Leaked Credential Checks on.

  - `id?: string`

    Defines the unique ID for this custom detection.

  - `password?: string`

    Defines ehe ruleset expression to use in matching the password in a request.

  - `username?: string`

    Defines the ruleset expression to use in matching the username in a request.

### 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 detection = await client.leakedCredentialChecks.detections.create({
  zone_id: '023e105f4ecef8ad9ca31a8372d0c353',
});

console.log(detection.id);
```

#### 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"
      }
    }
  ],
  "result": {
    "id": "18a14bafaa8eb1df04ce683ec18c765e",
    "password": "lookup_json_string(http.request.body.raw, \"secret\")",
    "username": "lookup_json_string(http.request.body.raw, \"user\")"
  },
  "success": true
}
```