RefreshTokenRequest

{
    "email": "user@example.com",
    "refresh_token": "a1b2c3d4e5f6...",
    "device_info": {
        "device_id": "550e8400-e29b-41d4-a716-446655440000",
        "device_name": "iPhone 15 Pro",
        "device_type": "mobile",
        "fcm_token": "dKJ8f3kL9m:APA91bH...",
        "platform": "ios"
    }
}