# Reject Device Registration

Reject a pending device registration request.

**Endpoint**: `POST /api/devices/reject/:registration_id`
**Auth**: Required (Admin only)

## Path Parameters

| Parameter       | Type          | Required | Description               |
| --------------- | ------------- | -------- | ------------------------- |
| registration_id | string (UUID) | Yes      | Registration request UUID |

## Request Headers

| Header        | Type   | Required | Description                         |
| ------------- | ------ | -------- | ----------------------------------- |
| Authorization | string | Yes      | Bearer token (must have admin role) |

### Example Request

```http
POST /api/devices/reject/550e8400-e29b-41d4-a716-446655440000
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
```

## Response (200 OK)

```json
{
  "message": "device registration rejected"
}
```

## Error Responses

| Code | Description                         |
| ---- | ----------------------------------- |
| 401  | Invalid or expired token            |
| 403  | User does not have admin privileges |
| 404  | Registration not found              |
| 400  | Registration already processed      |
