Where to find the secret key
To find your server secret you will need click "Settings" in your Buycraft control panel then click on "Servers".
On this page, you will see a list of the server secret keys which you have already created. You can also create new keys from this page or edit existing ones to show your current server secret keys. After editing the server secret key you will be able to click "Show Secret Key" to be able to copy your server secret key.
Once you have the server secret key you will need to enter it in the Buycraft configuration files or using the command: "buycraft secret <key here>".