CircleCI connects your GitHub or Bitbucket account to our system.
If you no longer want to build on CircleCI, visit your project settings page https://circleci.com/add-projects/gh/USERNAME and click "Unfollow all projects". Your account will then be inactive.
Note: If you're using a Bitbucket account, replace `gh` with `bb` in the URL above.
If you need to cancel your paid plan, please follow the steps here How to cancel or modify your plan