I recently had a spree of hack-attacks (or so I thought) via my Twitter account where it was making anonymous spammy tweets. I kept changing my password to no

I recently had a spree of hack-attacks (or so I thought) via my Twitter account where it was making anonymous spammy tweets. I kept changing my password to no avail. I then realized that it was a service that I had given permissions to a long time ago that had been hacked and the attacker was spamming tweets through my account via that service.