Please note that deleting a HubSpot connection from Superjoin is permanent. You may not be able to recover it again.
1

Go to 'Sources' in Superjoin

Launch Superjoin and Navigate to ‘Sources’ from the bottom navigation pane.

2

Delete the connection

Click on the 3-dot menu of the HubSpot account you wish to delete. Click on Delete and confirm it.

When you delete a connection on Superjoin, all associated imports/exports will also be deleted & the associated import schedules will be stopped. Your imported sheets however will not be impacted due to a deletion of an object.