VKAddChannelAccountDto

{
    "id": "550e8400-...",
    "vk_user_id": "12345",
    "first_name": "Максим",
    "last_name": "Лаптев",
    "avatar_url": "string",
    "is_token_valid": true,
    "token_error": "Token expired",
    "created_at": "2025-12-25T10:00:00Z"
}