php-btcpay-client-v2/examples/BitPay.config.json

{
    "BitPayConfiguration": {
        "Environment": "",
        "EnvConfig": {
            "Test": {
                "Url": "",
                "PrivateKeyPath": "",
                "PrivateKeySecret": "",
                "ApiTokens": {
                    "merchant": "",
                    "payroll": ""
                }
            }
        }
    }
}