{
    "$jsonSchema": {
        "required": [
            "user",
            "link",
            "label",
            "tg_name",
            "tg_phone",
            "tg_locale",
            "tg_username"
        ],
        "properties": {
            "user": {
                "bsonType": ["int", "long"],
                "description": "Telegram ID of user"
            },
            "link": {
                "bsonType": ["string", "null"],
                "description": "Invite link to destination group"
            },
            "label": {
                "bsonType": "string",
                "description": "Label given by admins"
            },
            "tg_name": {
                "bsonType": "string",
                "description": "Telegram first name"
            },
            "tg_phone": {
                "bsonType": ["string", "null"],
                "description": "Telegram phone number"
            },
            "tg_locale": {
                "bsonType": ["string", "null"],
                "description": "Telegram locale"
            },
            "tg_username": {
                "bsonType": ["string", "null"],
                "description": "Telegram username"
            }
        }
    }
}