About authorized GitHub Apps
You may authorize a GitHub App to give the app permission to access information on your GitHub account and to act on your behalf. For more information, see "Authorizing GitHub Apps."
You should periodically review the apps that you have authorized. If you no longer use an app, consider revoking your authorization for that app.
The authorization can only be revoked by the person who authorized the GitHub App. Organization owners cannot revoke app authorizations for their organization members. However, organization owners can uninstall the app from their organization, which will prevent the app from accessing organization-owned resources. For more information, see "Reviewing and modifying installed GitHub Apps."
Reviewing your authorized GitHub Apps
In the upper-right corner of any page, click your profile photo, then click Settings.
In the "Integrations" section of the sidebar, click Applications.
Click the Authorized GitHub Apps tab.
Review the GitHub Apps that have access to your account. For those that you don't recognize or that are out of date, click Revoke. To revoke all GitHub Apps, click Revoke all.