# 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 |
