If you are creating your account by coming from HubSpot App Marketplace, you should be prompted during the onboarding process to connect HubSpot to Collect.
Alternatively, you can also go to the settings / integrations. Here you will find an HubSpot block, click on “Connect to Hubspot”.
Select the HubSpot account you want to connect Collect to and select “Connect App”.
You’ll be redirected to the Collect dashboard when the integration is successfully set up.