Big Business needs an API Key from HubSpot. These is generated in HubSpot Dashboard.
For HubSpot Settings:
1. Go to the System toolbar, to the Company card, to the Connect Settings tab.
2. Click the Hub button and the HubSpot Connections listing will open.
3. Click New to create a new connection.
4. Edit the HubSpot Listing.
5. Copy and Paste API Key.
6. Click Test button to test the connection.
7. Click OK to Save settings and then click OK to Save the Company Card.