In the Hyperstack console, use the left navigation window to select the "API Keys" tabe (under MANAGE). Select "Generate a New API Key".
In the input form, specify an identifiable key name and an optional description then select Generate. The generated API key will be displayed. The key will only display once, so ensure you store it in a secure location.
Input this API key into the Control Plane API Keys page to finalise integrating Hyperstack.