Where can I find the extension license key?

Generally, extensions from Aheadworks have no license keys. With the exception of 2 modules:

• Buildify for Magento 2 
• Advanced Subscription Products for Magento 2 

To find the authorization keys for these extensions, go to My Projects and Licenses in your account on aheadworks.com. All authorization keys for these products are available on the Project Edit page: My Projects and Licenses → Projects → View Licenses 

Buildify:

To enter the authorization keys and start working with the extension, go to Stores → Configuration → Aheadworks Extensions → Buildify. Two keys are required: Public and Private API. 

Make sure, you use the authorization keys, not the Composer ones. The latter are used to install extensions from Aheadworks.

Advanced Subscription Products:

To activate the authorization keys, navigate to Stores → Configuration → Aheadworks Extensions → Advanced Subscription Products in your Magento Admin and enter the license key into the License Key field (located in the Integration Details section).

The authorization keys for this extension can be found on the Project Edit page under the Show API Keys button.

There are four keys available: one for production and three for testing environments. The Production Key should be used for your live store, while the Test Keys are intended for staging environments. Each key allows you to connect one store with Advanced Subscription Products.