Received unlock instructions but no unlock code

I recieved an approved email, but no unlock code for my device to be unlocked. There is no specific instruction on how to get my phone unlocked with no codes at all. Please give me an assistance for this issue. Thanks. The email I received from at&t is attached below:

Congratulations! Your request was approved IMEI:

Request number: [edited for privacy-please do not post personal or unique information such as but not limited to full names, employee ID numbers, email addresses, phone numbers, account numbers, etc.]

Hi,

We received and approved your request to unlock your Apple iPhone 6  device. Use the instructions in this email to unlock your device. Instructions: For more information about unlocking a device, check out our device unlock support page.

Thanks for choosing us, AT&T