Login to your account
Select Manage tab
Select Integration sub tab
Under "Internal" section click configure link for "API" module
Select "Yes" for "API Support active"
Press "Add new API key"
Populate "Identification Name" with some text and press "Save Settings" button
Move mouse cursor to created key, "see auth code" link will appear, click it to see Auth Code
If you would like more information on how to enable your Happyfox API, please follow this link: https://support.happyfox.com/kb/article/221-enabling-api-in-your-happyfox-account